11661973151 has 4 divisors (see below), whose sum is σ = 11662191552. Its totient is φ = 11661754752.

The previous prime is 11661973139. The next prime is 11661973177. The reversal of 11661973151 is 15137916611.

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

It is a cyclic number.

It is not a de Polignac number, because 11661973151 - 2¹⁸ = 11661711007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11661973099 and 11661973108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11661973051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30290 + ... + 155696.

It is an arithmetic number, because the mean of its divisors is an integer number (2915547888).

Almost surely, 2^11661973151 is an apocalyptic number.

11661973151 is a deficient number, since it is larger than the sum of its proper divisors (218401).

11661973151 is an equidigital number, since it uses as much as digits as its factorization.

11661973151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218400.

The product of its digits is 34020, while the sum is 41.

The spelling of 11661973151 in words is "eleven billion, six hundred sixty-one million, nine hundred seventy-three thousand, one hundred fifty-one".