261615704 has 64 divisors (see below), whose sum is σ = 580992000. Its totient is φ = 110369952.

The previous prime is 261615701. The next prime is 261615709. The reversal of 261615704 is 407516162.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261615701) 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, 183137 + ... + 184559.

It is an arithmetic number, because the mean of its divisors is an integer number (9078000).

Almost surely, 2^261615704 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 261615704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (290496000).

261615704 is an abundant number, since it is smaller than the sum of its proper divisors (319376296).

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

261615704 is a wasteful number, since it uses less digits than its factorization.

261615704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1517 (or 1499 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 261615704 is about 16174.5387569476. The cubic root of 261615704 is about 639.5697824808.

The spelling of 261615704 in words is "two hundred sixty-one million, six hundred fifteen thousand, seven hundred four".