55533372420 has 24 divisors (see below), whose sum is σ = 155493442944. Its totient is φ = 14808899296.

The previous prime is 55533372361. The next prime is 55533372449. The reversal of 55533372420 is 2427333555.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 462778044 + ... + 462778163.

It is an arithmetic number, because the mean of its divisors is an integer number (6478893456).

Almost surely, 2^55533372420 is an apocalyptic number.

It is an amenable number.

55533372420 is an abundant number, since it is smaller than the sum of its proper divisors (99960070524).

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

55533372420 is a wasteful number, since it uses less digits than its factorization.

55533372420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 925556219 (or 925556217 counting only the distinct ones).

The product of its (nonzero) digits is 378000, while the sum is 39.

The spelling of 55533372420 in words is "fifty-five billion, five hundred thirty-three million, three hundred seventy-two thousand, four hundred twenty".