51554105540 has 24 divisors (see below), whose sum is σ = 123729853632. Its totient is φ = 17675693280.

The previous prime is 51554105521. The next prime is 51554105587. The reversal of 51554105540 is 4550145515.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 51554105540.

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, 184121666 + ... + 184121945.

It is an arithmetic number, because the mean of its divisors is an integer number (5155410568).

Almost surely, 2^51554105540 is an apocalyptic number.

It is an amenable number.

51554105540 is an abundant number, since it is smaller than the sum of its proper divisors (72175748092).

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

51554105540 is a wasteful number, since it uses less digits than its factorization.

51554105540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368243627 (or 368243625 counting only the distinct ones).

The product of its (nonzero) digits is 50000, while the sum is 35.

The spelling of 51554105540 in words is "fifty-one billion, five hundred fifty-four million, one hundred five thousand, five hundred forty".