625071640 has 32 divisors (see below), whose sum is σ = 1489142880. Its totient is φ = 235320832.

The previous prime is 625071619. The next prime is 625071641. The reversal of 625071640 is 46170526.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (625071641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 458932 + ... + 460291.

It is an arithmetic number, because the mean of its divisors is an integer number (46535715).

Almost surely, 2^625071640 is an apocalyptic number.

It is an amenable number.

625071640 is an abundant number, since it is smaller than the sum of its proper divisors (864071240).

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

625071640 is a wasteful number, since it uses less digits than its factorization.

625071640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 919251 (or 919247 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 625071640 is about 25001.4327589440. The cubic root of 625071640 is about 855.0206394708.

The spelling of 625071640 in words is "six hundred twenty-five million, seventy-one thousand, six hundred forty".