216761572500 has 120 divisors (see below), whose sum is σ = 689475472224. Its totient is φ = 52548240000.

The previous prime is 216761572499. The next prime is 216761572567. The reversal of 216761572500 is 5275167612.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1231207 + ... + 1396206.

Almost surely, 2^216761572500 is an apocalyptic number.

216761572500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216761572500 is an abundant number, since it is smaller than the sum of its proper divisors (472713899724).

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

216761572500 is a wasteful number, since it uses less digits than its factorization.

216761572500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2627451 (or 2627434 counting only the distinct ones).

The product of its (nonzero) digits is 176400, while the sum is 42.

The spelling of 216761572500 in words is "two hundred sixteen billion, seven hundred sixty-one million, five hundred seventy-two thousand, five hundred".