656025745 has 4 divisors (see below), whose sum is σ = 787230900. Its totient is φ = 524820592.

The previous prime is 656025737. The next prime is 656025793. The reversal of 656025745 is 547520656.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 158155776 + 497869969 = 12576^2 + 22313^2 .

It is a cyclic number.

It is not a de Polignac number, because 656025745 - 2³ = 656025737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 656025698 and 656025707.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65602570 + ... + 65602579.

It is an arithmetic number, because the mean of its divisors is an integer number (196807725).

Almost surely, 2^656025745 is an apocalyptic number.

It is an amenable number.

656025745 is a deficient number, since it is larger than the sum of its proper divisors (131205155).

656025745 is a wasteful number, since it uses less digits than its factorization.

656025745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131205154.

The product of its (nonzero) digits is 252000, while the sum is 40.

The square root of 656025745 is about 25612.9995314879. Note that the first 3 decimals coincide. The cubic root of 656025745 is about 868.9076637404.

The spelling of 656025745 in words is "six hundred fifty-six million, twenty-five thousand, seven hundred forty-five".