11611051691 has 16 divisors (see below), whose sum is σ = 12139642368. Its totient is φ = 11096248800.

The previous prime is 11611051679. The next prime is 11611051721. The reversal of 11611051691 is 19615011611.

It is not a de Polignac number, because 11611051691 - 2¹⁰ = 11611050667 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11611051091) 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, 514556 + ... + 536646.

It is an arithmetic number, because the mean of its divisors is an integer number (758727648).

Almost surely, 2^11611051691 is an apocalyptic number.

11611051691 is a deficient number, since it is larger than the sum of its proper divisors (528590677).

11611051691 is a wasteful number, since it uses less digits than its factorization.

11611051691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22402.

The product of its (nonzero) digits is 1620, while the sum is 32.

The spelling of 11611051691 in words is "eleven billion, six hundred eleven million, fifty-one thousand, six hundred ninety-one".