216125587601540 has 24 divisors (see below), whose sum is σ = 453871020426432. Its totient is φ = 86448847142880.

The previous prime is 216125587601501. The next prime is 216125587601549. The reversal of 216125587601540 is 45106785521612.

It is a super-2 number, since 2×216125587601540² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (216125587601549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85466234 + ... + 87958673.

It is an arithmetic number, because the mean of its divisors is an integer number (18911292517768).

Almost surely, 2^{216125587601540} is an apocalyptic number.

216125587601540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216125587601540 is an abundant number, since it is smaller than the sum of its proper divisors (237745432824892).

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

216125587601540 is a wasteful number, since it uses less digits than its factorization.

216125587601540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173487227 (or 173487225 counting only the distinct ones).

The product of its (nonzero) digits is 4032000, while the sum is 53.

The spelling of 216125587601540 in words is "two hundred sixteen trillion, one hundred twenty-five billion, five hundred eighty-seven million, six hundred one thousand, five hundred forty".