11961642079 has 2 divisors, whose sum is σ = 11961642080. Its totient is φ = 11961642078.

The previous prime is 11961642067. The next prime is 11961642101. The reversal of 11961642079 is 97024616911.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11961642079 - 2⁹ = 11961641567 is a prime.

It is a super-2 number, since 2×11961642079² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11961642059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5980821039 + 5980821040.

It is an arithmetic number, because the mean of its divisors is an integer number (5980821040).

Almost surely, 2^11961642079 is an apocalyptic number.

11961642079 is a deficient number, since it is larger than the sum of its proper divisors (1).

11961642079 is an equidigital number, since it uses as much as digits as its factorization.

11961642079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 46.

The spelling of 11961642079 in words is "eleven billion, nine hundred sixty-one million, six hundred forty-two thousand, seventy-nine".