656377042 has 4 divisors (see below), whose sum is σ = 984565566. Its totient is φ = 328188520.

The previous prime is 656377027. The next prime is 656377049. The reversal of 656377042 is 240773656.

656377042 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 428034721 + 228342321 = 20689^2 + 15111^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 656376986 and 656377004.

It is not an unprimeable number, because it can be changed into a prime (656377049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164094259 + ... + 164094262.

Almost surely, 2^656377042 is an apocalyptic number.

656377042 is a deficient number, since it is larger than the sum of its proper divisors (328188524).

656377042 is a wasteful number, since it uses less digits than its factorization.

656377042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328188523.

The product of its (nonzero) digits is 211680, while the sum is 40.

The square root of 656377042 is about 25619.8564008466. The cubic root of 656377042 is about 869.0627339688.

The spelling of 656377042 in words is "six hundred fifty-six million, three hundred seventy-seven thousand, forty-two".