54156030621 has 72 divisors (see below), whose sum is σ = 94825254720. Its totient is φ = 26909160960.

The previous prime is 54156030613. The next prime is 54156030629. The reversal of 54156030621 is 12603065145.

It is an interprime number because it is at equal distance from previous prime (54156030613) and next prime (54156030629).

It is not a de Polignac number, because 54156030621 - 2³ = 54156030613 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54156030629) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1324045 + ... + 1364333.

Almost surely, 2^54156030621 is an apocalyptic number.

It is an amenable number.

54156030621 is a deficient number, since it is larger than the sum of its proper divisors (40669224099).

54156030621 is a wasteful number, since it uses less digits than its factorization.

54156030621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40367 (or 40333 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 33.

Adding to 54156030621 its reverse (12603065145), we get a palindrome (66759095766).

The spelling of 54156030621 in words is "fifty-four billion, one hundred fifty-six million, thirty thousand, six hundred twenty-one".