625392908642 has 4 divisors (see below), whose sum is σ = 938089362966. Its totient is φ = 312696454320.

The previous prime is 625392908641. The next prime is 625392908683. The reversal of 625392908642 is 246809293526.

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

It can be written as a sum of positive squares in only one way, i.e., 625097378161 + 295530481 = 790631^2 + 17191^2 .

It is a super-2 number, since 2×625392908642² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (625392908641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156348227159 + ... + 156348227162.

Almost surely, 2^625392908642 is an apocalyptic number.

625392908642 is a deficient number, since it is larger than the sum of its proper divisors (312696454324).

625392908642 is a wasteful number, since it uses less digits than its factorization.

625392908642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312696454323.

The product of its (nonzero) digits is 11197440, while the sum is 56.

The spelling of 625392908642 in words is "six hundred twenty-five billion, three hundred ninety-two million, nine hundred eight thousand, six hundred forty-two".