11910026557 has 32 divisors (see below), whose sum is σ = 14970291840. Its totient is φ = 9313056000.

The previous prime is 11910026551. The next prime is 11910026561. The reversal of 11910026557 is 75562001911.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11910026557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11910026551) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 129807 + ... + 201667.

It is an arithmetic number, because the mean of its divisors is an integer number (467821620).

Almost surely, 2^11910026557 is an apocalyptic number.

It is an amenable number.

11910026557 is a deficient number, since it is larger than the sum of its proper divisors (3060265283).

11910026557 is a wasteful number, since it uses less digits than its factorization.

11910026557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71965.

The product of its (nonzero) digits is 18900, while the sum is 37.

The spelling of 11910026557 in words is "eleven billion, nine hundred ten million, twenty-six thousand, five hundred fifty-seven".