213897556277120 has 64 divisors (see below), whose sum is σ = 511357199882400. Its totient is φ = 85557624649728.

The previous prime is 213897556277087. The next prime is 213897556277137. The reversal of 213897556277120 is 21772655798312.

It is a tau number, because it is divible by the number of its divisors (64).

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 7 ways as a sum of consecutive naturals, for example, 36922517 + ... + 42321003.

Almost surely, 2^{213897556277120} is an apocalyptic number.

213897556277120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213897556277120 is an abundant number, since it is smaller than the sum of its proper divisors (297459643605280).

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

213897556277120 is an equidigital number, since it uses as much as digits as its factorization.

213897556277120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5460415 (or 5460403 counting only the distinct ones).

The product of its (nonzero) digits is 88905600, while the sum is 65.

The spelling of 213897556277120 in words is "two hundred thirteen trillion, eight hundred ninety-seven billion, five hundred fifty-six million, two hundred seventy-seven thousand, one hundred twenty".