216400296735 has 64 divisors (see below), whose sum is σ = 439867084800. Its totient is φ = 98881606656.

The previous prime is 216400296727. The next prime is 216400296737. The reversal of 216400296735 is 537692004612.

216400296735 is a `hidden beast` number, since 216 + 400 + 29 + 6 + 7 + 3 + 5 = 666.

It is not a de Polignac number, because 216400296735 - 2³ = 216400296727 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216400296737) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2111151 + ... + 2211279.

It is an arithmetic number, because the mean of its divisors is an integer number (6872923200).

Almost surely, 2^216400296735 is an apocalyptic number.

216400296735 is an abundant number, since it is smaller than the sum of its proper divisors (223466788065).

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

216400296735 is a wasteful number, since it uses less digits than its factorization.

216400296735 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102437 (or 102431 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 45.

The spelling of 216400296735 in words is "two hundred sixteen billion, four hundred million, two hundred ninety-six thousand, seven hundred thirty-five".