54651639 has 16 divisors (see below), whose sum is σ = 84851712. Its totient is φ = 30639648.

The previous prime is 54651637. The next prime is 54651661. The reversal of 54651639 is 93615645.

It is not a de Polignac number, because 54651639 - 2¹ = 54651637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 54651597 and 54651606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54651637) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23439 + ... + 25664.

It is an arithmetic number, because the mean of its divisors is an integer number (5303232).

Almost surely, 2^54651639 is an apocalyptic number.

54651639 is a deficient number, since it is larger than the sum of its proper divisors (30200073).

54651639 is a wasteful number, since it uses less digits than its factorization.

54651639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49166.

The product of its digits is 97200, while the sum is 39.

The square root of 54651639 is about 7392.6746851190. The cubic root of 54651639 is about 379.4906356344.

The spelling of 54651639 in words is "fifty-four million, six hundred fifty-one thousand, six hundred thirty-nine".