51355380860 has 48 divisors (see below), whose sum is σ = 124069209600. Its totient is φ = 17490945600.

The previous prime is 51355380827. The next prime is 51355380889. The reversal of 51355380860 is 6808355315.

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, 1193510 + ... + 1235789.

It is an arithmetic number, because the mean of its divisors is an integer number (2584775200).

Almost surely, 2^51355380860 is an apocalyptic number.

It is an amenable number.

51355380860 is an abundant number, since it is smaller than the sum of its proper divisors (72713828740).

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

51355380860 is a wasteful number, since it uses less digits than its factorization.

51355380860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2429466 (or 2429464 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 44.

The spelling of 51355380860 in words is "fifty-one billion, three hundred fifty-five million, three hundred eighty thousand, eight hundred sixty".