215116079977240 has 64 divisors (see below), whose sum is σ = 521244724160160. Its totient is φ = 79427183877120.

The previous prime is 215116079977223. The next prime is 215116079977243. The reversal of 215116079977240 is 42779970611512.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215116079977243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 184127412 + ... + 185292028.

Almost surely, 2^{215116079977240} is an apocalyptic number.

215116079977240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215116079977240 is an abundant number, since it is smaller than the sum of its proper divisors (306128644182920).

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

215116079977240 is a wasteful number, since it uses less digits than its factorization.

215116079977240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1519852 (or 1519848 counting only the distinct ones).

The product of its (nonzero) digits is 13335840, while the sum is 61.

The spelling of 215116079977240 in words is "two hundred fifteen trillion, one hundred sixteen billion, seventy-nine million, nine hundred seventy-seven thousand, two hundred forty".