625580081 has 4 divisors (see below), whose sum is σ = 714948672. Its totient is φ = 536211492.

The previous prime is 625580051. The next prime is 625580107. The reversal of 625580081 is 180085526.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 180085526 = 2 ⋅90042763.

It is a cyclic number.

It is not a de Polignac number, because 625580081 - 2⁶ = 625580017 is a prime.

It is a super-2 number, since 2×625580081² = 782700875487933122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (625580051) 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, 44684285 + ... + 44684298.

It is an arithmetic number, because the mean of its divisors is an integer number (178737168).

Almost surely, 2^625580081 is an apocalyptic number.

It is an amenable number.

625580081 is a deficient number, since it is larger than the sum of its proper divisors (89368591).

625580081 is an equidigital number, since it uses as much as digits as its factorization.

625580081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89368590.

The product of its (nonzero) digits is 19200, while the sum is 35.

The square root of 625580081 is about 25011.5989292968. The cubic root of 625580081 is about 855.2524047616.

The spelling of 625580081 in words is "six hundred twenty-five million, five hundred eighty thousand, eighty-one".