253661161 has 8 divisors (see below), whose sum is σ = 273728000. Its totient is φ = 233673552.

The previous prime is 253661123. The next prime is 253661167. The reversal of 253661161 is 161166352.

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

It is a cyclic number.

It is not a de Polignac number, because 253661161 - 2¹³ = 253652969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (253661167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13065 + ... + 26038.

It is an arithmetic number, because the mean of its divisors is an integer number (34216000).

Almost surely, 2^253661161 is an apocalyptic number.

It is an amenable number.

253661161 is a deficient number, since it is larger than the sum of its proper divisors (20066839).

253661161 is a wasteful number, since it uses less digits than its factorization.

253661161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39615.

The product of its digits is 6480, while the sum is 31.

The square root of 253661161 is about 15926.7435780200. The cubic root of 253661161 is about 633.0208167906.

The spelling of 253661161 in words is "two hundred fifty-three million, six hundred sixty-one thousand, one hundred sixty-one".