51326522540 has 48 divisors (see below), whose sum is σ = 109667174400. Its totient is φ = 20172580032.

The previous prime is 51326522539. The next prime is 51326522561. The reversal of 51326522540 is 4522562315.

It is a self number, because there is not a number n which added to its sum of digits gives 51326522540.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2632307 + ... + 2651733.

It is an arithmetic number, because the mean of its divisors is an integer number (2284732800).

Almost surely, 2^51326522540 is an apocalyptic number.

It is an amenable number.

51326522540 is an abundant number, since it is smaller than the sum of its proper divisors (58340651860).

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

51326522540 is a wasteful number, since it uses less digits than its factorization.

51326522540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21734 (or 21732 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 35.

The spelling of 51326522540 in words is "fifty-one billion, three hundred twenty-six million, five hundred twenty-two thousand, five hundred forty".