21060570662055 has 24 divisors (see below), whose sum is σ = 37103431597440. Its totient is φ = 11048168214720.

The previous prime is 21060570661997. The next prime is 21060570662057. The reversal of 21060570662055 is 55026607506012.

21060570662055 is a `hidden beast` number, since 2 + 1 + 0 + 6 + 0 + 570 + 6 + 6 + 20 + 55 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-21060570662055 is a prime.

It is a super-2 number, since 2×21060570662055² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 21060570662055.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21060570662057) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 3836166775 + ... + 3836172264.

It is an arithmetic number, because the mean of its divisors is an integer number (1545976316560).

Almost surely, 2^{21060570662055} is an apocalyptic number.

21060570662055 is a deficient number, since it is larger than the sum of its proper divisors (16042860935385).

21060570662055 is a wasteful number, since it uses less digits than its factorization.

21060570662055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7672339111 (or 7672339108 counting only the distinct ones).

The product of its (nonzero) digits is 756000, while the sum is 45.

The spelling of 21060570662055 in words is "twenty-one trillion, sixty billion, five hundred seventy million, six hundred sixty-two thousand, fifty-five".