639792535425 has 48 divisors (see below), whose sum is σ = 1120224229632. Its totient is φ = 321090278400.

The previous prime is 639792535423. The next prime is 639792535427. The reversal of 639792535425 is 524535297936.

It is an interprime number because it is at equal distance from previous prime (639792535423) and next prime (639792535427).

It is not a de Polignac number, because 639792535425 - 2¹ = 639792535423 is a prime.

It is not an unprimeable number, because it can be changed into a prime (639792535423) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7155495 + ... + 7244355.

It is an arithmetic number, because the mean of its divisors is an integer number (23338004784).

Almost surely, 2^639792535425 is an apocalyptic number.

It is an amenable number.

639792535425 is a deficient number, since it is larger than the sum of its proper divisors (480431694207).

639792535425 is a wasteful number, since it uses less digits than its factorization.

639792535425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94538 (or 94533 counting only the distinct ones).

The product of its digits is 61236000, while the sum is 60.

The spelling of 639792535425 in words is "six hundred thirty-nine billion, seven hundred ninety-two million, five hundred thirty-five thousand, four hundred twenty-five".