54617137621 has 2 divisors, whose sum is σ = 54617137622. Its totient is φ = 54617137620.

The previous prime is 54617137507. The next prime is 54617137633. The reversal of 54617137621 is 12673171645.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47145436900 + 7471700721 = 217130^2 + 86439^2 .

It is a cyclic number.

It is not a de Polignac number, because 54617137621 - 2¹³ = 54617129429 is a prime.

It is a super-2 number, since 2×54617137621² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54617137691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27308568810 + 27308568811.

It is an arithmetic number, because the mean of its divisors is an integer number (27308568811).

Almost surely, 2^54617137621 is an apocalyptic number.

It is an amenable number.

54617137621 is a deficient number, since it is larger than the sum of its proper divisors (1).

54617137621 is an equidigital number, since it uses as much as digits as its factorization.

54617137621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 211680, while the sum is 43.

It can be divided in two parts, 54617 and 137621, that multiplied together give a palindrome (7516446157).

The spelling of 54617137621 in words is "fifty-four billion, six hundred seventeen million, one hundred thirty-seven thousand, six hundred twenty-one".