215664526341 has 12 divisors (see below), whose sum is σ = 339835011360. Its totient is φ = 130705773480.

The previous prime is 215664526339. The next prime is 215664526349. The reversal of 215664526341 is 143625466512.

215664526341 is a `hidden beast` number, since 2 + 1 + 5 + 6 + 6 + 4 + 5 + 2 + 634 + 1 = 666.

It is not a de Polignac number, because 215664526341 - 2¹ = 215664526339 is a prime.

It is a super-2 number, since 2×215664526341² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215664526349) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1089214681 + ... + 1089214878.

It is an arithmetic number, because the mean of its divisors is an integer number (28319584280).

Almost surely, 2^215664526341 is an apocalyptic number.

It is an amenable number.

215664526341 is a deficient number, since it is larger than the sum of its proper divisors (124170485019).

215664526341 is a wasteful number, since it uses less digits than its factorization.

215664526341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2178429576 (or 2178429573 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 45.

The spelling of 215664526341 in words is "two hundred fifteen billion, six hundred sixty-four million, five hundred twenty-six thousand, three hundred forty-one".