261491162 has 8 divisors (see below), whose sum is σ = 392955456. Its totient is φ = 130506012.

The previous prime is 261491159. The next prime is 261491171. The reversal of 261491162 is 261194162.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×261491162² = 136755255608220488, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118418 + ... + 120605.

It is an arithmetic number, because the mean of its divisors is an integer number (49119432).

Almost surely, 2^261491162 is an apocalyptic number.

261491162 is a deficient number, since it is larger than the sum of its proper divisors (131464294).

261491162 is a wasteful number, since it uses less digits than its factorization.

261491162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239572.

The product of its digits is 5184, while the sum is 32.

The square root of 261491162 is about 16170.6883588795. The cubic root of 261491162 is about 639.4682774340.

The spelling of 261491162 in words is "two hundred sixty-one million, four hundred ninety-one thousand, one hundred sixty-two".