50781721104 has 135 divisors (see below), whose sum is σ = 144417493389. Its totient is φ = 16657724160.

The previous prime is 50781721069. The next prime is 50781721127. The reversal of 50781721104 is 40112718705.

The square root of 50781721104 is 225348.

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

50781721104 is a `hidden beast` number, since 507 + 81 + 72 + 1 + 1 + 0 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 9751167504 + 41030553600 = 98748^2 + 202560^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 240671559 + ... + 240671769.

Almost surely, 2^50781721104 is an apocalyptic number.

50781721104 is the 225348-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 50781721104

50781721104 is an abundant number, since it is smaller than the sum of its proper divisors (93635772285).

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

50781721104 is an equidigital number, since it uses as much as digits as its factorization.

50781721104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614 (or 305 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 36.

Multiplying 50781721104 by its sum of digits (36), we get a square (1828141959744 = 1352088²).

50781721104 divided by its sum of digits (36) gives a square (1410603364 = 37558²).

The spelling of 50781721104 in words is "fifty billion, seven hundred eighty-one million, seven hundred twenty-one thousand, one hundred four".