261162153 has 24 divisors (see below), whose sum is σ = 431600000. Its totient is φ = 149071104.

The previous prime is 261162151. The next prime is 261162173. The reversal of 261162153 is 351261162.

261162153 is a `hidden beast` number, since 26 + 11 + 621 + 5 + 3 = 666.

It is not a de Polignac number, because 261162153 - 2¹ = 261162151 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261162151) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 77028 + ... + 80346.

Almost surely, 2^261162153 is an apocalyptic number.

It is an amenable number.

261162153 is a deficient number, since it is larger than the sum of its proper divisors (170437847).

261162153 is a wasteful number, since it uses less digits than its factorization.

261162153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4581 (or 4578 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 261162153 is about 16160.5121515378. The cubic root of 261162153 is about 639.1999712106.

Subtracting 261162153 from its reverse (351261162), we obtain a palindrome (90099009).

The spelling of 261162153 in words is "two hundred sixty-one million, one hundred sixty-two thousand, one hundred fifty-three".