1165111163954 has 4 divisors (see below), whose sum is σ = 1747666745934. Its totient is φ = 582555581976.

The previous prime is 1165111163941. The next prime is 1165111163963. The reversal of 1165111163954 is 4593611115611.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 777015805225 + 388095358729 = 881485^2 + 622973^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 291277790987 + ... + 291277790990.

Almost surely, 2^{1165111163954} is an apocalyptic number.

1165111163954 is a deficient number, since it is larger than the sum of its proper divisors (582555581980).

1165111163954 is an equidigital number, since it uses as much as digits as its factorization.

1165111163954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582555581979.

The product of its digits is 97200, while the sum is 44.

The spelling of 1165111163954 in words is "one trillion, one hundred sixty-five billion, one hundred eleven million, one hundred sixty-three thousand, nine hundred fifty-four".