15794400425 has 6 divisors (see below), whose sum is σ = 19585056558. Its totient is φ = 12635520320.

The previous prime is 15794400421. The next prime is 15794400451. The reversal of 15794400425 is 52400449751.

It can be written as a sum of positive squares in 3 ways, for example, as 3734187664 + 12060212761 = 61108^2 + 109819^2 .

It is not a de Polignac number, because 15794400425 - 2² = 15794400421 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15794400421) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 315887984 + ... + 315888033.

It is an arithmetic number, because the mean of its divisors is an integer number (3264176093).

Almost surely, 2^15794400425 is an apocalyptic number.

It is an amenable number.

15794400425 is a deficient number, since it is larger than the sum of its proper divisors (3790656133).

15794400425 is an equidigital number, since it uses as much as digits as its factorization.

15794400425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631776027 (or 631776022 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 41.

The spelling of 15794400425 in words is "fifteen billion, seven hundred ninety-four million, four hundred thousand, four hundred twenty-five".