51451195940 has 24 divisors (see below), whose sum is σ = 108205735680. Its totient is φ = 20550340448.

The previous prime is 51451195933. The next prime is 51451195981. The reversal of 51451195940 is 4959115415.

It is a junction number, because it is equal to n+sod(n) for n = 51451195891 and 51451195900.

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, 1869620 + ... + 1896939.

It is an arithmetic number, because the mean of its divisors is an integer number (4508572320).

Almost surely, 2^51451195940 is an apocalyptic number.

It is an amenable number.

51451195940 is an abundant number, since it is smaller than the sum of its proper divisors (56754539740).

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

51451195940 is a wasteful number, since it uses less digits than its factorization.

51451195940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3767251 (or 3767249 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 44.

The spelling of 51451195940 in words is "fifty-one billion, four hundred fifty-one million, one hundred ninety-five thousand, nine hundred forty".