11578704148991 has 4 divisors (see below), whose sum is σ = 13232804741712. Its totient is φ = 9924603556272.

The previous prime is 11578704148951. The next prime is 11578704148993. The reversal of 11578704148991 is 19984140787511.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11578704148991 - 2²⁶ = 11578637040127 is a prime.

It is a super-2 number, since 2×11578704148991² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11578704148993) 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, 827050296350 + ... + 827050296363.

It is an arithmetic number, because the mean of its divisors is an integer number (3308201185428).

Almost surely, 2^{11578704148991} is an apocalyptic number.

11578704148991 is a deficient number, since it is larger than the sum of its proper divisors (1654100592721).

11578704148991 is an equidigital number, since it uses as much as digits as its factorization.

11578704148991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1654100592720.

The product of its (nonzero) digits is 20321280, while the sum is 65.

The spelling of 11578704148991 in words is "eleven trillion, five hundred seventy-eight billion, seven hundred four million, one hundred forty-eight thousand, nine hundred ninety-one".