216136370457 has 12 divisors (see below), whose sum is σ = 356796548160. Its totient is φ = 123506497368.

The previous prime is 216136370449. The next prime is 216136370521. The reversal of 216136370457 is 754073631612.

216136370457 is a `hidden beast` number, since 2 + 1 + 6 + 1 + 3 + 637 + 0 + 4 + 5 + 7 = 666.

It is not a de Polignac number, because 216136370457 - 2³ = 216136370449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216136370557) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1715367957 + ... + 1715368082.

It is an arithmetic number, because the mean of its divisors is an integer number (29733045680).

Almost surely, 2^216136370457 is an apocalyptic number.

It is an amenable number.

216136370457 is a deficient number, since it is larger than the sum of its proper divisors (140660177703).

216136370457 is a wasteful number, since it uses less digits than its factorization.

216136370457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3430736052 (or 3430736049 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 45.

The spelling of 216136370457 in words is "two hundred sixteen billion, one hundred thirty-six million, three hundred seventy thousand, four hundred fifty-seven".