651208311996 has 72 divisors (see below), whose sum is σ = 1758083120640. Its totient is φ = 186949746720.

The previous prime is 651208311979. The next prime is 651208311997. The reversal of 651208311996 is 699113802156.

651208311996 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×651208311996² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651208311997) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11774796 + ... + 11829971.

It is an arithmetic number, because the mean of its divisors is an integer number (24417821120).

Almost surely, 2^651208311996 is an apocalyptic number.

651208311996 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

651208311996 is an abundant number, since it is smaller than the sum of its proper divisors (1106874808644).

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

651208311996 is a wasteful number, since it uses less digits than its factorization.

651208311996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23604815 (or 23604802 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 51.

The spelling of 651208311996 in words is "six hundred fifty-one billion, two hundred eight million, three hundred eleven thousand, nine hundred ninety-six".