1161655401 has 8 divisors (see below), whose sum is σ = 1563084160. Its totient is φ = 767331792.

The previous prime is 1161655381. The next prime is 1161655409. The reversal of 1161655401 is 1045561611.

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

It is not a de Polignac number, because 1161655401 - 2¹³ = 1161647209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1161655409) 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, 1775905 + ... + 1776558.

It is an arithmetic number, because the mean of its divisors is an integer number (195385520).

Almost surely, 2^1161655401 is an apocalyptic number.

It is an amenable number.

1161655401 is a deficient number, since it is larger than the sum of its proper divisors (401428759).

1161655401 is a wasteful number, since it uses less digits than its factorization.

1161655401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3552575.

The product of its (nonzero) digits is 3600, while the sum is 30.

The square root of 1161655401 is about 34083.0661912921. The cubic root of 1161655401 is about 1051.2171527122.

The spelling of 1161655401 in words is "one billion, one hundred sixty-one million, six hundred fifty-five thousand, four hundred one".