51240686370 has 32 divisors (see below), whose sum is σ = 129450156480. Its totient is φ = 12945015360.

The previous prime is 51240686353. The next prime is 51240686381. The reversal of 51240686370 is 7368604215.

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, 44947401 + ... + 44948540.

It is an arithmetic number, because the mean of its divisors is an integer number (4045317390).

Almost surely, 2^51240686370 is an apocalyptic number.

51240686370 is an abundant number, since it is smaller than the sum of its proper divisors (78209470110).

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

51240686370 is a wasteful number, since it uses less digits than its factorization.

51240686370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89895970.

The product of its (nonzero) digits is 241920, while the sum is 42.

The spelling of 51240686370 in words is "fifty-one billion, two hundred forty million, six hundred eighty-six thousand, three hundred seventy".