11880178547 has 4 divisors (see below), whose sum is σ = 11890815456. Its totient is φ = 11869541640.

The previous prime is 11880178451. The next prime is 11880178613. The reversal of 11880178547 is 74587108811.

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 11880178547 - 2⁸ = 11880178291 is a prime.

It is a super-2 number, since 2×11880178547² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11880178495 and 11880178504.

It is not an unprimeable number, because it can be changed into a prime (11880178147) 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, 5316779 + ... + 5319012.

It is an arithmetic number, because the mean of its divisors is an integer number (2972703864).

Almost surely, 2^11880178547 is an apocalyptic number.

11880178547 is a deficient number, since it is larger than the sum of its proper divisors (10636909).

11880178547 is a wasteful number, since it uses less digits than its factorization.

11880178547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10636908.

The product of its (nonzero) digits is 501760, while the sum is 50.

The spelling of 11880178547 in words is "eleven billion, eight hundred eighty million, one hundred seventy-eight thousand, five hundred forty-seven".