55538432868015 has 48 divisors (see below), whose sum is σ = 101930400842400. Its totient is φ = 27877830414336.

The previous prime is 55538432868013. The next prime is 55538432868043. The reversal of 55538432868015 is 51086823483555.

It is a happy number.

55538432868015 is a `hidden beast` number, since 5 + 5 + 5 + 38 + 432 + 86 + 80 + 15 = 666.

It is not a de Polignac number, because 55538432868015 - 2¹ = 55538432868013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55538432868013) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 88410951 + ... + 89036919.

It is an arithmetic number, because the mean of its divisors is an integer number (2123550017550).

Almost surely, 2^{55538432868015} is an apocalyptic number.

55538432868015 is a deficient number, since it is larger than the sum of its proper divisors (46391967974385).

55538432868015 is a wasteful number, since it uses less digits than its factorization.

55538432868015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 741976 (or 741973 counting only the distinct ones).

The product of its (nonzero) digits is 138240000, while the sum is 63.

The spelling of 55538432868015 in words is "fifty-five trillion, five hundred thirty-eight billion, four hundred thirty-two million, eight hundred sixty-eight thousand, fifteen".