55820237928 has 64 divisors (see below), whose sum is σ = 171754584960. Its totient is φ = 14721820416.

The previous prime is 55820237917. The next prime is 55820237951. The reversal of 55820237928 is 82973202855.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12777175 + ... + 12781542.

It is an arithmetic number, because the mean of its divisors is an integer number (2683665390).

Almost surely, 2^55820237928 is an apocalyptic number.

It is an amenable number.

55820237928 is an abundant number, since it is smaller than the sum of its proper divisors (115934347032).

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

55820237928 is a wasteful number, since it uses less digits than its factorization.

55820237928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25558746 (or 25558742 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 51.

The spelling of 55820237928 in words is "fifty-five billion, eight hundred twenty million, two hundred thirty-seven thousand, nine hundred twenty-eight".