55929618381 has 16 divisors (see below), whose sum is σ = 91781938304. Its totient is φ = 29501337024.

The previous prime is 55929618379. The next prime is 55929618389. The reversal of 55929618381 is 18381692955.

It is a happy number.

It is not a de Polignac number, because 55929618381 - 2¹ = 55929618379 is a prime.

It is a super-2 number, since 2×55929618381² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55929618389) 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, 102434926 + ... + 102435471.

It is an arithmetic number, because the mean of its divisors is an integer number (5736371144).

Almost surely, 2^55929618381 is an apocalyptic number.

It is an amenable number.

55929618381 is a deficient number, since it is larger than the sum of its proper divisors (35852319923).

55929618381 is a wasteful number, since it uses less digits than its factorization.

55929618381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204870420.

The product of its digits is 4665600, while the sum is 57.

The spelling of 55929618381 in words is "fifty-five billion, nine hundred twenty-nine million, six hundred eighteen thousand, three hundred eighty-one".