55397950428 has 12 divisors (see below), whose sum is σ = 129261884360. Its totient is φ = 18465983472.

The previous prime is 55397950423. The next prime is 55397950469. The reversal of 55397950428 is 82405979355.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55397950423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2308247923 + ... + 2308247946.

Almost surely, 2^55397950428 is an apocalyptic number.

It is an amenable number.

55397950428 is an abundant number, since it is smaller than the sum of its proper divisors (73863933932).

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

55397950428 is a wasteful number, since it uses less digits than its factorization.

55397950428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4616495876 (or 4616495874 counting only the distinct ones).

The product of its (nonzero) digits is 13608000, while the sum is 57.

The spelling of 55397950428 in words is "fifty-five billion, three hundred ninety-seven million, nine hundred fifty thousand, four hundred twenty-eight".