51612501250 has 20 divisors (see below), whose sum is σ = 96742474686. Its totient is φ = 20645000000.

The previous prime is 51612501191. The next prime is 51612501251. The reversal of 51612501250 is 5210521615.

It can be written as a sum of positive squares in 5 ways, for example, as 5526286921 + 46086214329 = 74339^2 + 214677^2 .

It is not an unprimeable number, because it can be changed into a prime (51612501251) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 20643751 + ... + 20646250.

Almost surely, 2^51612501250 is an apocalyptic number.

51612501250 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51612501250 is a deficient number, since it is larger than the sum of its proper divisors (45129973436).

51612501250 is an equidigital number, since it uses as much as digits as its factorization.

51612501250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41290023 (or 41290008 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 28.

The spelling of 51612501250 in words is "fifty-one billion, six hundred twelve million, five hundred one thousand, two hundred fifty".