51602867816 has 32 divisors (see below), whose sum is σ = 97791873480. Its totient is φ = 25525248000.

The previous prime is 51602867801. The next prime is 51602867839. The reversal of 51602867816 is 61876820615.

It can be written as a sum of positive squares in 4 ways, for example, as 51459107716 + 143760100 = 226846^2 + 11990^2 .

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2161706 + ... + 2185446.

Almost surely, 2^51602867816 is an apocalyptic number.

It is an amenable number.

51602867816 is a deficient number, since it is larger than the sum of its proper divisors (46189005664).

51602867816 is a wasteful number, since it uses less digits than its factorization.

51602867816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26645 (or 26641 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 50.

The spelling of 51602867816 in words is "fifty-one billion, six hundred two million, eight hundred sixty-seven thousand, eight hundred sixteen".