51525261550 has 72 divisors (see below), whose sum is σ = 111535372440. Its totient is φ = 17657640000.

The previous prime is 51525261533. The next prime is 51525261679. The reversal of 51525261550 is 5516252515.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 7961716 + ... + 7968184.

It is an arithmetic number, because the mean of its divisors is an integer number (1549102395).

Almost surely, 2^51525261550 is an apocalyptic number.

51525261550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51525261550 is an abundant number, since it is smaller than the sum of its proper divisors (60010110890).

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

51525261550 is a wasteful number, since it uses less digits than its factorization.

51525261550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9746 (or 9734 counting only the distinct ones).

The product of its (nonzero) digits is 75000, while the sum is 37.

The spelling of 51525261550 in words is "fifty-one billion, five hundred twenty-five million, two hundred sixty-one thousand, five hundred fifty".