625453918601 has 4 divisors (see below), whose sum is σ = 638761448832. Its totient is φ = 612146388372.

The previous prime is 625453918589. The next prime is 625453918613. The reversal of 625453918601 is 106819354526.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (625453918589) and next prime (625453918613).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-625453918601 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 625453918601.

It is not an unprimeable number, because it can be changed into a prime (625453918801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6653765045 + ... + 6653765138.

It is an arithmetic number, because the mean of its divisors is an integer number (159690362208).

Almost surely, 2^625453918601 is an apocalyptic number.

It is an amenable number.

625453918601 is a deficient number, since it is larger than the sum of its proper divisors (13307530231).

625453918601 is a wasteful number, since it uses less digits than its factorization.

625453918601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13307530230.

The product of its (nonzero) digits is 1555200, while the sum is 50.

The spelling of 625453918601 in words is "six hundred twenty-five billion, four hundred fifty-three million, nine hundred eighteen thousand, six hundred one".