261347610 has 32 divisors (see below), whose sum is σ = 634288320. Its totient is φ = 68908928.

The previous prime is 261347609. The next prime is 261347617. The reversal of 261347610 is 16743162.

261347610 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (261347617) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46272 + ... + 51611.

It is an arithmetic number, because the mean of its divisors is an integer number (19821510).

Almost surely, 2^261347610 is an apocalyptic number.

261347610 is an abundant number, since it is smaller than the sum of its proper divisors (372940710).

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

261347610 is a wasteful number, since it uses less digits than its factorization.

261347610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97982.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 261347610 is about 16166.2491011366. The cubic root of 261347610 is about 639.3512387386.

The spelling of 261347610 in words is "two hundred sixty-one million, three hundred forty-seven thousand, six hundred ten".