51568495040 has 224 divisors, whose sum is σ = 133991055360. Its totient is φ = 18845798400.

The previous prime is 51568495039. The next prime is 51568495123. The reversal of 51568495040 is 4059486515.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18023210 + ... + 18026070.

Almost surely, 2^51568495040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51568495040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66995527680).

51568495040 is an abundant number, since it is smaller than the sum of its proper divisors (82422560320).

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

51568495040 is a wasteful number, since it uses less digits than its factorization.

51568495040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3011 (or 3001 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 47.

The spelling of 51568495040 in words is "fifty-one billion, five hundred sixty-eight million, four hundred ninety-five thousand, forty".