54153377721 has 12 divisors (see below), whose sum is σ = 78418582372. Its totient is φ = 36011311776.

The previous prime is 54153377699. The next prime is 54153377749. The reversal of 54153377721 is 12777335145.

54153377721 is a `hidden beast` number, since 5 + 41 + 533 + 7 + 7 + 72 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 26244000000 + 27909377721 = 162000^2 + 167061^2 .

It is not a de Polignac number, because 54153377721 - 2²³ = 54144989113 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (54153377221) 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 11 ways as a sum of consecutive naturals, for example, 7574566 + ... + 7581711.

Almost surely, 2^54153377721 is an apocalyptic number.

It is an amenable number.

54153377721 is a deficient number, since it is larger than the sum of its proper divisors (24265204651).

54153377721 is a wasteful number, since it uses less digits than its factorization.

54153377721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15156680 (or 15156677 counting only the distinct ones).

The product of its digits is 617400, while the sum is 45.

The spelling of 54153377721 in words is "fifty-four billion, one hundred fifty-three million, three hundred seventy-seven thousand, seven hundred twenty-one".