261299694 has 16 divisors (see below), whose sum is σ = 522794880. Its totient is φ = 87067320.

The previous prime is 261299693. The next prime is 261299767. The reversal of 261299694 is 496992162.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261299693) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13767 + ... + 26685.

It is an arithmetic number, because the mean of its divisors is an integer number (32674680).

Almost surely, 2^261299694 is an apocalyptic number.

261299694 is an abundant number, since it is smaller than the sum of its proper divisors (261495186).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261299694 is a wasteful number, since it uses less digits than its factorization.

261299694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16295.

The product of its digits is 419904, while the sum is 48.

The square root of 261299694 is about 16164.7670567812. The cubic root of 261299694 is about 639.3121630335.

The spelling of 261299694 in words is "two hundred sixty-one million, two hundred ninety-nine thousand, six hundred ninety-four".