261400756 has 6 divisors (see below), whose sum is σ = 457451330. Its totient is φ = 130700376.

The previous prime is 261400747. The next prime is 261400859. The reversal of 261400756 is 657004162.

It is a happy number.

261400756 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 243048100 + 18352656 = 15590^2 + 4284^2 .

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, 32675091 + ... + 32675098.

Almost surely, 2^261400756 is an apocalyptic number.

It is an amenable number.

261400756 is a deficient number, since it is larger than the sum of its proper divisors (196050574).

261400756 is a wasteful number, since it uses less digits than its factorization.

261400756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65350193 (or 65350191 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 261400756 is about 16167.8927507576. The cubic root of 261400756 is about 639.3945739451.

The spelling of 261400756 in words is "two hundred sixty-one million, four hundred thousand, seven hundred fifty-six".