11916972619 has 2 divisors, whose sum is σ = 11916972620. Its totient is φ = 11916972618.

The previous prime is 11916972611. The next prime is 11916972631. The reversal of 11916972619 is 91627961911.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11916972619 - 2³ = 11916972611 is a prime.

It is a super-2 number, since 2×11916972619² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11916972611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5958486309 + 5958486310.

It is an arithmetic number, because the mean of its divisors is an integer number (5958486310).

Almost surely, 2^11916972619 is an apocalyptic number.

11916972619 is a deficient number, since it is larger than the sum of its proper divisors (1).

11916972619 is an equidigital number, since it uses as much as digits as its factorization.

11916972619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 367416, while the sum is 52.

The spelling of 11916972619 in words is "eleven billion, nine hundred sixteen million, nine hundred seventy-two thousand, six hundred nineteen".