55291521406 has 48 divisors (see below), whose sum is σ = 96198698880. Its totient is φ = 23572188000.

The previous prime is 55291521401. The next prime is 55291521407. The reversal of 55291521406 is 60412519255.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55291521401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4257535 + ... + 4270501.

It is an arithmetic number, because the mean of its divisors is an integer number (2004139560).

Almost surely, 2^55291521406 is an apocalyptic number.

55291521406 is a deficient number, since it is larger than the sum of its proper divisors (40907177474).

55291521406 is a wasteful number, since it uses less digits than its factorization.

55291521406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13201 (or 13100 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 40.

The spelling of 55291521406 in words is "fifty-five billion, two hundred ninety-one million, five hundred twenty-one thousand, four hundred six".