625640071 has 8 divisors (see below), whose sum is σ = 727136640. Its totient is φ = 527173368.

The previous prime is 625640051. The next prime is 625640111. The reversal of 625640071 is 170046526.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 625640071 - 2⁵ = 625640039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (625640051) 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, 757021 + ... + 757846.

It is an arithmetic number, because the mean of its divisors is an integer number (90892080).

Almost surely, 2^625640071 is an apocalyptic number.

625640071 is a deficient number, since it is larger than the sum of its proper divisors (101496569).

625640071 is a wasteful number, since it uses less digits than its factorization.

625640071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1514933.

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

The square root of 625640071 is about 25012.7981441501. The cubic root of 625640071 is about 855.2797420300.

Adding to 625640071 its reverse (170046526), we get a palindrome (795686597).

The spelling of 625640071 in words is "six hundred twenty-five million, six hundred forty thousand, seventy-one".