1161600155 has 4 divisors (see below), whose sum is σ = 1393920192. Its totient is φ = 929280120.

The previous prime is 1161600149. The next prime is 1161600161. The reversal of 1161600155 is 5510061611.

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

It is an interprime number because it is at equal distance from previous prime (1161600149) and next prime (1161600161).

It is not a de Polignac number, because 1161600155 - 2¹⁴ = 1161583771 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116160011 + ... + 116160020.

It is an arithmetic number, because the mean of its divisors is an integer number (348480048).

Almost surely, 2^1161600155 is an apocalyptic number.

1161600155 is a deficient number, since it is larger than the sum of its proper divisors (232320037).

1161600155 is an equidigital number, since it uses as much as digits as its factorization.

1161600155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232320036.

The product of its (nonzero) digits is 900, while the sum is 26.

The square root of 1161600155 is about 34082.2557205359. The cubic root of 1161600155 is about 1051.2004878552.

Adding to 1161600155 its reverse (5510061611), we get a palindrome (6671661766).

The spelling of 1161600155 in words is "one billion, one hundred sixty-one million, six hundred thousand, one hundred fifty-five".