50721103515625 has 99 divisors (see below), whose sum is σ = 66157945422429. Its totient is φ = 38885437500000.

The previous prime is 50721103515617. The next prime is 50721103515629. The reversal of 50721103515625 is 52651530112705.

The square root of 50721103515625 is 7121875.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 16 ways, for example, as 10844303438761 + 39876800076864 = 3293069^2 + 6314808^2 .

It is not a de Polignac number, because 50721103515625 - 2³ = 50721103515617 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50721103515629) by changing a digit.

It is a polite number, since it can be written in 98 ways as a sum of consecutive naturals, for example, 957001953099 + ... + 957001953151.

Almost surely, 2^{50721103515625} is an apocalyptic number.

50721103515625 is the 7121875-th square number.

50721103515625 is the 3560938-th centered octagonal number.

It is an amenable number.

50721103515625 is a deficient number, since it is larger than the sum of its proper divisors (15436841906804).

50721103515625 is an frugal number, since it uses more digits than its factorization.

50721103515625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242 (or 101 counting only the distinct ones).

The product of its (nonzero) digits is 315000, while the sum is 43.

The spelling of 50721103515625 in words is "fifty trillion, seven hundred twenty-one billion, one hundred three million, five hundred fifteen thousand, six hundred twenty-five".