215626761551201 has 32 divisors (see below), whose sum is σ = 290581168152576. Its totient is φ = 154523861352000.

The previous prime is 215626761551183. The next prime is 215626761551249. The reversal of 215626761551201 is 102155167626512.

It is not a de Polignac number, because 215626761551201 - 2¹⁸ = 215626761289057 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 215626761551201.

It is not an unprimeable number, because it can be changed into a prime (215626761551251) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 397166645 + ... + 397709186.

It is an arithmetic number, because the mean of its divisors is an integer number (9080661504768).

Almost surely, 2^{215626761551201} is an apocalyptic number.

It is an amenable number.

215626761551201 is a deficient number, since it is larger than the sum of its proper divisors (74954406601375).

215626761551201 is a wasteful number, since it uses less digits than its factorization.

215626761551201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794876133.

The product of its (nonzero) digits is 1512000, while the sum is 50.

The spelling of 215626761551201 in words is "two hundred fifteen trillion, six hundred twenty-six billion, seven hundred sixty-one million, five hundred fifty-one thousand, two hundred one".