55966361438 has 48 divisors (see below), whose sum is σ = 93918528000. Its totient is φ = 24975493920.

The previous prime is 55966361417. The next prime is 55966361441. The reversal of 55966361438 is 83416366955.

It is a happy number.

It is a super-2 number, since 2×55966361438² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20734613 + ... + 20737311.

It is an arithmetic number, because the mean of its divisors is an integer number (1956636000).

Almost surely, 2^55966361438 is an apocalyptic number.

55966361438 is a deficient number, since it is larger than the sum of its proper divisors (37952166562).

55966361438 is a wasteful number, since it uses less digits than its factorization.

55966361438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4737 (or 4724 counting only the distinct ones).

The product of its digits is 13996800, while the sum is 56.

The spelling of 55966361438 in words is "fifty-five billion, nine hundred sixty-six million, three hundred sixty-one thousand, four hundred thirty-eight".