51165610016 has 24 divisors (see below), whose sum is σ = 100814335020. Its totient is φ = 25561969408.

The previous prime is 51165610003. The next prime is 51165610031. The reversal of 51165610016 is 61001656115.

It can be written as a sum of positive squares in 2 ways, for example, as 51048883600 + 116726416 = 225940^2 + 10804^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 611171 + ... + 689826.

Almost surely, 2^51165610016 is an apocalyptic number.

It is an amenable number.

51165610016 is a deficient number, since it is larger than the sum of its proper divisors (49648725004).

51165610016 is a wasteful number, since it uses less digits than its factorization.

51165610016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1302236 (or 1302228 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 32.

The spelling of 51165610016 in words is "fifty-one billion, one hundred sixty-five million, six hundred ten thousand, sixteen".