51725153561816 has 128 divisors (see below), whose sum is σ = 111329119042560. Its totient is φ = 22070328076800.

The previous prime is 51725153561803. The next prime is 51725153561843. The reversal of 51725153561816 is 61816535152715.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35746477205 + ... + 35746478651.

It is an arithmetic number, because the mean of its divisors is an integer number (869758742520).

Almost surely, 2^{51725153561816} is an apocalyptic number.

51725153561816 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

51725153561816 is an abundant number, since it is smaller than the sum of its proper divisors (59603965480744).

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

51725153561816 is a wasteful number, since it uses less digits than its factorization.

51725153561816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4225 (or 4221 counting only the distinct ones).

The product of its digits is 7560000, while the sum is 56.

The spelling of 51725153561816 in words is "fifty-one trillion, seven hundred twenty-five billion, one hundred fifty-three million, five hundred sixty-one thousand, eight hundred sixteen".