11913261511 has 2 divisors, whose sum is σ = 11913261512. Its totient is φ = 11913261510.

The previous prime is 11913261487. The next prime is 11913261553. The reversal of 11913261511 is 11516231911.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11913261511 - 2³¹ = 9765777863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11913262511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5956630755 + 5956630756.

It is an arithmetic number, because the mean of its divisors is an integer number (5956630756).

Almost surely, 2^11913261511 is an apocalyptic number.

11913261511 is a deficient number, since it is larger than the sum of its proper divisors (1).

11913261511 is an equidigital number, since it uses as much as digits as its factorization.

11913261511 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1620, while the sum is 31.

The spelling of 11913261511 in words is "eleven billion, nine hundred thirteen million, two hundred sixty-one thousand, five hundred eleven".