11537161261 has 12 divisors (see below), whose sum is σ = 12082072608. Its totient is φ = 10995999344.

The previous prime is 11537161241. The next prime is 11537161289. The reversal of 11537161261 is 16216173511.

It is not a de Polignac number, because 11537161261 - 2⁹ = 11537160749 is a prime.

It is a super-2 number, since 2×11537161261² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11537161241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1971606 + ... + 1977448.

It is an arithmetic number, because the mean of its divisors is an integer number (1006839384).

Almost surely, 2^11537161261 is an apocalyptic number.

It is an amenable number.

11537161261 is a deficient number, since it is larger than the sum of its proper divisors (544911347).

11537161261 is an frugal number, since it uses more digits than its factorization.

11537161261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6452 (or 6159 counting only the distinct ones).

The product of its digits is 7560, while the sum is 34.

The spelling of 11537161261 in words is "eleven billion, five hundred thirty-seven million, one hundred sixty-one thousand, two hundred sixty-one".