50551861520 has 40 divisors (see below), whose sum is σ = 117573296256. Its totient is φ = 20213825408.

The previous prime is 50551861519. The next prime is 50551861537. The reversal of 50551861520 is 2516815505.

It is a tau number, because it is divible by the number of its divisors (40).

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, 130409 + ... + 343671.

Almost surely, 2^50551861520 is an apocalyptic number.

It is an amenable number.

50551861520 is an abundant number, since it is smaller than the sum of its proper divisors (67021434736).

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

50551861520 is a wasteful number, since it uses less digits than its factorization.

50551861520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216239 (or 216233 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 38.

The spelling of 50551861520 in words is "fifty billion, five hundred fifty-one million, eight hundred sixty-one thousand, five hundred twenty".