51435931665970 has 64 divisors (see below), whose sum is σ = 92904772464000. Its totient is φ = 20503397984256.

The previous prime is 51435931665959. The next prime is 51435931665991. The reversal of 51435931665970 is 7956613953415.

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, 16230964546 + ... + 16230967714.

It is an arithmetic number, because the mean of its divisors is an integer number (1451637069750).

Almost surely, 2^{51435931665970} is an apocalyptic number.

51435931665970 is a deficient number, since it is larger than the sum of its proper divisors (41468840798030).

51435931665970 is a wasteful number, since it uses less digits than its factorization.

51435931665970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7787.

The product of its (nonzero) digits is 91854000, while the sum is 64.

The spelling of 51435931665970 in words is "fifty-one trillion, four hundred thirty-five billion, nine hundred thirty-one million, six hundred sixty-five thousand, nine hundred seventy".