425750177334721 has 16 divisors (see below), whose sum is σ = 466340293688400. Its totient is φ = 386887473430528.

The previous prime is 425750177334589. The next prime is 425750177334733. The reversal of 425750177334721 is 127433771057524.

425750177334721 = 14590239² + 14590240².

It can be written as a sum of positive squares in 8 ways, for example, as 159389009004096 + 266361168330625 = 12624936^2 + 16320575^2 .

It is not a de Polignac number, because 425750177334721 - 2³⁵ = 425715817596353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (425754177334721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 201467841 + ... + 203570113.

It is an arithmetic number, because the mean of its divisors is an integer number (29146268355525).

Almost surely, 2^{425750177334721} is an apocalyptic number.

425750177334721 is the 11912881-st octagonal number.

425750177334721 is the 14590240-th centered square number.

It is an amenable number.

425750177334721 is a deficient number, since it is larger than the sum of its proper divisors (40590116353679).

425750177334721 is a wasteful number, since it uses less digits than its factorization.

425750177334721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2513108.

The product of its (nonzero) digits is 34574400, while the sum is 58.

The spelling of 425750177334721 in words is "four hundred twenty-five trillion, seven hundred fifty billion, one hundred seventy-seven million, three hundred thirty-four thousand, seven hundred twenty-one".