51011653250 has 16 divisors (see below), whose sum is σ = 95493815352. Its totient is φ = 20404661200.

The previous prime is 51011653243. The next prime is 51011653307. The reversal of 51011653250 is 5235611015.

It can be written as a sum of positive squares in 4 ways, for example, as 22548926569 + 28462726681 = 150163^2 + 168709^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102023057 + ... + 102023556.

Almost surely, 2^51011653250 is an apocalyptic number.

51011653250 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51011653250 is a deficient number, since it is larger than the sum of its proper divisors (44482162102).

51011653250 is a wasteful number, since it uses less digits than its factorization.

51011653250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204046630 (or 204046620 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 29.

The spelling of 51011653250 in words is "fifty-one billion, eleven million, six hundred fifty-three thousand, two hundred fifty".