625624642 has 4 divisors (see below), whose sum is σ = 938436966. Its totient is φ = 312812320.

The previous prime is 625624591. The next prime is 625624651. The reversal of 625624642 is 246426526.

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., 612513001 + 13111641 = 24749^2 + 3621^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156406159 + ... + 156406162.

Almost surely, 2^625624642 is an apocalyptic number.

625624642 is a deficient number, since it is larger than the sum of its proper divisors (312812324).

625624642 is a wasteful number, since it uses less digits than its factorization.

625624642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312812323.

The product of its digits is 138240, while the sum is 37.

The square root of 625624642 is about 25012.4897201378. The cubic root of 625624642 is about 855.2727112465.

The spelling of 625624642 in words is "six hundred twenty-five million, six hundred twenty-four thousand, six hundred forty-two".