5125471720961 has 4 divisors (see below), whose sum is σ = 5125625593812. Its totient is φ = 5125317848112.

The previous prime is 5125471720933. The next prime is 5125471721053. The reversal of 5125471720961 is 1690271745215.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3927705640336 + 1197766080625 = 1981844^2 + 1094425^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5125471720961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5125471722961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76886450 + ... + 76953083.

It is an arithmetic number, because the mean of its divisors is an integer number (1281406398453).

Almost surely, 2^{5125471720961} is an apocalyptic number.

It is an amenable number.

5125471720961 is a deficient number, since it is larger than the sum of its proper divisors (153872851).

5125471720961 is a wasteful number, since it uses less digits than its factorization.

5125471720961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153872850.

The product of its (nonzero) digits is 1058400, while the sum is 50.

The spelling of 5125471720961 in words is "five trillion, one hundred twenty-five billion, four hundred seventy-one million, seven hundred twenty thousand, nine hundred sixty-one".