1156136955 has 16 divisors (see below), whose sum is σ = 1873236480. Its totient is φ = 608800608.

The previous prime is 1156136951. The next prime is 1156136987. The reversal of 1156136955 is 5596316511.

It is not a de Polignac number, because 1156136955 - 2² = 1156136951 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1156136951) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 486637 + ... + 489006.

It is an arithmetic number, because the mean of its divisors is an integer number (117077280).

Almost surely, 2^1156136955 is an apocalyptic number.

1156136955 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1156136955 is a deficient number, since it is larger than the sum of its proper divisors (717099525).

1156136955 is an equidigital number, since it uses as much as digits as its factorization.

1156136955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 975730.

The product of its digits is 121500, while the sum is 42.

The square root of 1156136955 is about 34002.0139844686. The cubic root of 1156136955 is about 1049.5499068638.

It can be divided in two parts, 11561 and 36955, that added together give a triangular number (48516 = T₃₁₁).

The spelling of 1156136955 in words is "one billion, one hundred fifty-six million, one hundred thirty-six thousand, nine hundred fifty-five".