2153164656621 has 32 divisors (see below), whose sum is σ = 3145293081216. Its totient is φ = 1299359232000.

The previous prime is 2153164656611. The next prime is 2153164656631. The reversal of 2153164656621 is 1266564613512.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2153164656611) and next prime (2153164656631).

It is not a de Polignac number, because 2153164656621 - 2⁵ = 2153164656589 is a prime.

It is a super-2 number, since 2×2153164656621² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2153164656611) 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, 83310661 + ... + 83336501.

It is an arithmetic number, because the mean of its divisors is an integer number (98290408788).

Almost surely, 2^{2153164656621} is an apocalyptic number.

It is an amenable number.

2153164656621 is a deficient number, since it is larger than the sum of its proper divisors (992128424595).

2153164656621 is a wasteful number, since it uses less digits than its factorization.

2153164656621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36573.

The product of its digits is 1555200, while the sum is 48.

The spelling of 2153164656621 in words is "two trillion, one hundred fifty-three billion, one hundred sixty-four million, six hundred fifty-six thousand, six hundred twenty-one".