651323116620 has 72 divisors (see below), whose sum is σ = 2155287410640. Its totient is φ = 157896512640.

The previous prime is 651323116603. The next prime is 651323116663. The reversal of 651323116620 is 26611323156.

651323116620 is a `hidden beast` number, since 6 + 5 + 1 + 3 + 23 + 1 + 1 + 6 + 620 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 164473555 + ... + 164477514.

It is an arithmetic number, because the mean of its divisors is an integer number (29934547370).

Almost surely, 2^651323116620 is an apocalyptic number.

651323116620 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

651323116620 is an abundant number, since it is smaller than the sum of its proper divisors (1503964294020).

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

651323116620 is a wasteful number, since it uses less digits than its factorization.

651323116620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328951095 (or 328951090 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

Adding to 651323116620 its reverse (26611323156), we get a palindrome (677934439776).

The spelling of 651323116620 in words is "six hundred fifty-one billion, three hundred twenty-three million, one hundred sixteen thousand, six hundred twenty".