625442634 has 64 divisors (see below), whose sum is σ = 1468442880. Its totient is φ = 199384416.

The previous prime is 625442617. The next prime is 625442651. The reversal of 625442634 is 436244526.

625442634 is a `hidden beast` number, since 62 + 544 + 26 + 34 = 666.

It is an interprime number because it is at equal distance from previous prime (625442617) and next prime (625442651).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 97494 + ... + 103710.

It is an arithmetic number, because the mean of its divisors is an integer number (22944420).

Almost surely, 2^625442634 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 625442634, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (734221440).

625442634 is an abundant number, since it is smaller than the sum of its proper divisors (843000246).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

625442634 is an equidigital number, since it uses as much as digits as its factorization.

625442634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6263 (or 6245 counting only the distinct ones).

The product of its digits is 138240, while the sum is 36.

The square root of 625442634 is about 25008.8511131559. The cubic root of 625442634 is about 855.1897639737.

The spelling of 625442634 in words is "six hundred twenty-five million, four hundred forty-two thousand, six hundred thirty-four".