651878437056 has 448 divisors, whose sum is σ = 2306289438720. Its totient is φ = 157377392640.

The previous prime is 651878437039. The next prime is 651878437073. The reversal of 651878437056 is 650734878156.

651878437056 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (651878437039) and next prime (651878437073).

It is a tau number, because it is divible by the number of its divisors (448).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 14865595 + ... + 14909381.

Almost surely, 2^651878437056 is an apocalyptic number.

651878437056 is a gapful number since it is divisible by the number (66) 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 651878437056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1153144719360).

651878437056 is an abundant number, since it is smaller than the sum of its proper divisors (1654411001664).

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

651878437056 is a wasteful number, since it uses less digits than its factorization.

651878437056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43892 (or 43882 counting only the distinct ones).

The product of its (nonzero) digits is 33868800, while the sum is 60.

The spelling of 651878437056 in words is "six hundred fifty-one billion, eight hundred seventy-eight million, four hundred thirty-seven thousand, fifty-six".