51851091480 has 64 divisors (see below), whose sum is σ = 157007082240. Its totient is φ = 13697730432.

The previous prime is 51851091449. The next prime is 51851091499. The reversal of 51851091480 is 8419015815.

It is a congruent 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, 2006284 + ... + 2031963.

It is an arithmetic number, because the mean of its divisors is an integer number (2453235660).

Almost surely, 2^51851091480 is an apocalyptic number.

It is an amenable number.

51851091480 is an abundant number, since it is smaller than the sum of its proper divisors (105155990760).

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

51851091480 is a wasteful number, since it uses less digits than its factorization.

51851091480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4038368 (or 4038364 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 42.

The spelling of 51851091480 in words is "fifty-one billion, eight hundred fifty-one million, ninety-one thousand, four hundred eighty".