11918491928401 has 4 divisors (see below), whose sum is σ = 11942186743872. Its totient is φ = 11894797112932.

The previous prime is 11918491928393. The next prime is 11918491928419. The reversal of 11918491928401 is 10482919481911.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11918491928401 - 2³ = 11918491928393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11918491928461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11847406981 + ... + 11847407986.

It is an arithmetic number, because the mean of its divisors is an integer number (2985546685968).

Almost surely, 2^{11918491928401} is an apocalyptic number.

It is an amenable number.

11918491928401 is a deficient number, since it is larger than the sum of its proper divisors (23694815471).

11918491928401 is an equidigital number, since it uses as much as digits as its factorization.

11918491928401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23694815470.

The product of its (nonzero) digits is 1492992, while the sum is 58.

The spelling of 11918491928401 in words is "eleven trillion, nine hundred eighteen billion, four hundred ninety-one million, nine hundred twenty-eight thousand, four hundred one".