55591953426 has 16 divisors (see below), whose sum is σ = 123537674400. Its totient is φ = 18530651124.

The previous prime is 55591953421. The next prime is 55591953437. The reversal of 55591953426 is 62435919555.

55591953426 is a `hidden beast` number, since 5 + 5 + 591 + 9 + 5 + 3 + 42 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 1029480619 = 55591953426 / (5 + 5 + 5 + 9 + 1 + 9 + 5 + 3 + 4 + 2 + 6).

It is not an unprimeable number, because it can be changed into a prime (55591953421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 514740256 + ... + 514740363.

It is an arithmetic number, because the mean of its divisors is an integer number (7721104650).

Almost surely, 2^55591953426 is an apocalyptic number.

55591953426 is an abundant number, since it is smaller than the sum of its proper divisors (67945720974).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55591953426 is a wasteful number, since it uses less digits than its factorization.

55591953426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1029480630 (or 1029480624 counting only the distinct ones).

The product of its digits is 7290000, while the sum is 54.

The spelling of 55591953426 in words is "fifty-five billion, five hundred ninety-one million, nine hundred fifty-three thousand, four hundred twenty-six".