11917967061 has 64 divisors (see below), whose sum is σ = 21636550656. Its totient is φ = 5634316800.

The previous prime is 11917967053. The next prime is 11917967071. The reversal of 11917967061 is 16076971911.

It is not a de Polignac number, because 11917967061 - 2³ = 11917967053 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11917967061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11917967021) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 185265 + ... + 241161.

It is an arithmetic number, because the mean of its divisors is an integer number (338071104).

Almost surely, 2^11917967061 is an apocalyptic number.

11917967061 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11917967061 is a deficient number, since it is larger than the sum of its proper divisors (9718583595).

11917967061 is a wasteful number, since it uses less digits than its factorization.

11917967061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56002.

The product of its (nonzero) digits is 142884, while the sum is 48.

The spelling of 11917967061 in words is "eleven billion, nine hundred seventeen million, nine hundred sixty-seven thousand, sixty-one".