651554201340 has 144 divisors (see below), whose sum is σ = 2261110505472. Its totient is φ = 148769140608.

The previous prime is 651554201339. The next prime is 651554201399. The reversal of 651554201340 is 43102455156.

651554201340 is a `hidden beast` number, since 6 + 51 + 55 + 420 + 134 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 651554201295 and 651554201304.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 920197 + ... + 1466243.

It is an arithmetic number, because the mean of its divisors is an integer number (15702156288).

Almost surely, 2^651554201340 is an apocalyptic number.

651554201340 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 651554201340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1130555252736).

651554201340 is an abundant number, since it is smaller than the sum of its proper divisors (1609556304132).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

651554201340 is a wasteful number, since it uses less digits than its factorization.

651554201340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547016 (or 547011 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

Adding to 651554201340 its reverse (43102455156), we get a palindrome (694656656496).

The spelling of 651554201340 in words is "six hundred fifty-one billion, five hundred fifty-four million, two hundred one thousand, three hundred forty".