261677956 has 12 divisors (see below), whose sum is σ = 482038480. Its totient is φ = 123952680.

The previous prime is 261677953. The next prime is 261677963. The reversal of 261677956 is 659776162.

261677956 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (261677951) 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, 1721490 + ... + 1721641.

Almost surely, 2^261677956 is an apocalyptic number.

It is an amenable number.

261677956 is a deficient number, since it is larger than the sum of its proper divisors (220360524).

261677956 is a wasteful number, since it uses less digits than its factorization.

261677956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3443154 (or 3443152 counting only the distinct ones).

The product of its digits is 952560, while the sum is 49.

The square root of 261677956 is about 16176.4630250250. The cubic root of 261677956 is about 639.6205074435.

The spelling of 261677956 in words is "two hundred sixty-one million, six hundred seventy-seven thousand, nine hundred fifty-six".