261369360 has 120 divisors (see below), whose sum is σ = 1003179840. Its totient is φ = 59740416.

The previous prime is 261369349. The next prime is 261369371. The reversal of 261369360 is 63963162.

261369360 is a `hidden beast` number, since 2 + 613 + 6 + 9 + 36 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (261369349) and next prime (261369371).

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20890 + ... + 30969.

It is an arithmetic number, because the mean of its divisors is an integer number (8359832).

Almost surely, 2^261369360 is an apocalyptic number.

261369360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

261369360 is an abundant number, since it is smaller than the sum of its proper divisors (741810480).

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

261369360 is a wasteful number, since it uses less digits than its factorization.

261369360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51885 (or 51876 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 36.

The square root of 261369360 is about 16166.9217849286. The cubic root of 261369360 is about 639.3689743816.

The spelling of 261369360 in words is "two hundred sixty-one million, three hundred sixty-nine thousand, three hundred sixty".