11178292891 has 2 divisors, whose sum is σ = 11178292892. Its totient is φ = 11178292890.

The previous prime is 11178292877. The next prime is 11178292913. The reversal of 11178292891 is 19829287111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11178292891 - 2¹⁹ = 11177768603 is a prime.

It is a super-2 number, since 2×11178292891² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11178292831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5589146445 + 5589146446.

It is an arithmetic number, because the mean of its divisors is an integer number (5589146446).

Almost surely, 2^11178292891 is an apocalyptic number.

11178292891 is a deficient number, since it is larger than the sum of its proper divisors (1).

11178292891 is an equidigital number, since it uses as much as digits as its factorization.

11178292891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 49.

The spelling of 11178292891 in words is "eleven billion, one hundred seventy-eight million, two hundred ninety-two thousand, eight hundred ninety-one".