625678481 has 4 divisors (see below), whose sum is σ = 625857264. Its totient is φ = 625499700.

The previous prime is 625678477. The next prime is 625678513. The reversal of 625678481 is 184876526.

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 a cyclic number.

It is not a de Polignac number, because 625678481 - 2² = 625678477 is a prime.

It is a super-2 number, since 2×625678481² = 782947123172934722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (625678411) 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, 84035 + ... + 91176.

It is an arithmetic number, because the mean of its divisors is an integer number (156464316).

Almost surely, 2^625678481 is an apocalyptic number.

It is an amenable number.

625678481 is a deficient number, since it is larger than the sum of its proper divisors (178783).

625678481 is a wasteful number, since it uses less digits than its factorization.

625678481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178782.

The product of its digits is 645120, while the sum is 47.

The square root of 625678481 is about 25013.5659393058. The cubic root of 625678481 is about 855.2972444376.

The spelling of 625678481 in words is "six hundred twenty-five million, six hundred seventy-eight thousand, four hundred eighty-one".