651063221040 has 40 divisors (see below), whose sum is σ = 2018295985968. Its totient is φ = 173616858880.

The previous prime is 651063221009. The next prime is 651063221047. The reversal of 651063221040 is 40122360156.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 651063220989 and 651063221007.

It is not an unprimeable number, because it can be changed into a prime (651063221047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1356381471 + ... + 1356381950.

Almost surely, 2^651063221040 is an apocalyptic number.

651063221040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

651063221040 is an abundant number, since it is smaller than the sum of its proper divisors (1367232764928).

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

651063221040 is a wasteful number, since it uses less digits than its factorization.

651063221040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2712763437 (or 2712763431 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

Adding to 651063221040 its reverse (40122360156), we get a palindrome (691185581196).

The spelling of 651063221040 in words is "six hundred fifty-one billion, sixty-three million, two hundred twenty-one thousand, forty".