51621374000 has 80 divisors (see below), whose sum is σ = 142652018496. Its totient is φ = 17698752000.

The previous prime is 51621373943. The next prime is 51621374039. The reversal of 51621374000 is 47312615.

It is a tau number, because it is divible by the number of its divisors (80).

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, 1829621 + ... + 1857620.

Almost surely, 2^51621374000 is an apocalyptic number.

51621374000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51621374000 is an abundant number, since it is smaller than the sum of its proper divisors (91030644496).

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

51621374000 is a wasteful number, since it uses less digits than its factorization.

51621374000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3687271 (or 3687255 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

Adding to 51621374000 its reverse (47312615), we get a palindrome (51668686615).

The spelling of 51621374000 in words is "fifty-one billion, six hundred twenty-one million, three hundred seventy-four thousand".