249165656 has 8 divisors (see below), whose sum is σ = 467185620. Its totient is φ = 124582824.

The previous prime is 249165641. The next prime is 249165689. The reversal of 249165656 is 656561942.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15572846 + ... + 15572861.

Almost surely, 2^249165656 is an apocalyptic number.

It is an amenable number.

249165656 is a deficient number, since it is larger than the sum of its proper divisors (218019964).

249165656 is a wasteful number, since it uses less digits than its factorization.

249165656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31145713 (or 31145709 counting only the distinct ones).

The product of its digits is 388800, while the sum is 44.

The square root of 249165656 is about 15784.9819765497. The cubic root of 249165656 is about 629.2589388364.

It can be divided in two parts, 249165 and 656, that multiplied together give a triangular number (163452240 = T₁₈₀₈₀).

The spelling of 249165656 in words is "two hundred forty-nine million, one hundred sixty-five thousand, six hundred fifty-six".