1161958404097 has 8 divisors (see below), whose sum is σ = 1164394432872. Its totient is φ = 1159523164800.

The previous prime is 1161958404083. The next prime is 1161958404127. The reversal of 1161958404097 is 7904048591611.

It can be written as a sum of positive squares in 4 ways, for example, as 67338174016 + 1094620230081 = 259496^2 + 1046241^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1161958404097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1161958404197) 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, 2796823 + ... + 3185299.

It is an arithmetic number, because the mean of its divisors is an integer number (145549304109).

Almost surely, 2^{1161958404097} is an apocalyptic number.

It is an amenable number.

1161958404097 is a deficient number, since it is larger than the sum of its proper divisors (2436028775).

1161958404097 is an equidigital number, since it uses as much as digits as its factorization.

1161958404097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394739.

The product of its (nonzero) digits is 2177280, while the sum is 55.

The spelling of 1161958404097 in words is "one trillion, one hundred sixty-one billion, nine hundred fifty-eight million, four hundred four thousand, ninety-seven".