51548271990 has 32 divisors (see below), whose sum is σ = 123721862400. Its totient is φ = 13745538144.

The previous prime is 51548271953. The next prime is 51548272033. The reversal of 51548271990 is 9917284515.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 1083687 + ... + 1130253.

It is an arithmetic number, because the mean of its divisors is an integer number (3866308200).

Almost surely, 2^51548271990 is an apocalyptic number.

51548271990 is an abundant number, since it is smaller than the sum of its proper divisors (72173590410).

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

51548271990 is a wasteful number, since it uses less digits than its factorization.

51548271990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83476.

The product of its (nonzero) digits is 907200, while the sum is 51.

The spelling of 51548271990 in words is "fifty-one billion, five hundred forty-eight million, two hundred seventy-one thousand, nine hundred ninety".