11681761 has 32 divisors (see below), whose sum is σ = 15353856. Its totient is φ = 8640000.

The previous prime is 11681741. The next prime is 11681773. The reversal of 11681761 is 16718611.

11681761 = T₄₅₄ + T₄₅₅ + ... + T₅₄₆.

It is a 4-Lehmer number, since φ(11681761) divides (11681761-1)⁴.

It is a cyclic number.

It is not a de Polignac number, because 11681761 - 2⁵ = 11681729 is a prime.

It is a super-2 number, since 2×11681761² = 272927080122242, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a deceptive number, since it divides R_11681760.

It is not an unprimeable number, because it can be changed into a prime (11681731) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 115611 + ... + 115711.

It is an arithmetic number, because the mean of its divisors is an integer number (479808).

Almost surely, 2^11681761 is an apocalyptic number.

It is an amenable number.

11681761 is a deficient number, since it is larger than the sum of its proper divisors (3672095).

11681761 is a wasteful number, since it uses less digits than its factorization.

11681761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193.

The product of its digits is 2016, while the sum is 31.

The square root of 11681761 is about 3417.8591252420. The cubic root of 11681761 is about 226.9008409830.

The spelling of 11681761 in words is "eleven million, six hundred eighty-one thousand, seven hundred sixty-one".