51490864250 has 64 divisors (see below), whose sum is σ = 111172089600. Its totient is φ = 17491982400.

The previous prime is 51490864231. The next prime is 51490864277. The reversal of 51490864250 is 5246809415.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55781 + ... + 325719.

It is an arithmetic number, because the mean of its divisors is an integer number (1737063900).

Almost surely, 2^51490864250 is an apocalyptic number.

51490864250 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51490864250 is an abundant number, since it is smaller than the sum of its proper divisors (59681225350).

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

51490864250 is a wasteful number, since it uses less digits than its factorization.

51490864250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270072 (or 270062 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 44.

The spelling of 51490864250 in words is "fifty-one billion, four hundred ninety million, eight hundred sixty-four thousand, two hundred fifty".