12018177644 has 48 divisors (see below), whose sum is σ = 24138759456. Its totient is φ = 5185497600.

The previous prime is 12018177617. The next prime is 12018177653. The reversal of 12018177644 is 44677181021.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23279 + ... + 156774.

It is an arithmetic number, because the mean of its divisors is an integer number (502890822).

Almost surely, 2^12018177644 is an apocalyptic number.

It is an amenable number.

12018177644 is an abundant number, since it is smaller than the sum of its proper divisors (12120581812).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12018177644 is a wasteful number, since it uses less digits than its factorization.

12018177644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180146 (or 180144 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 41.

The spelling of 12018177644 in words is "twelve billion, eighteen million, one hundred seventy-seven thousand, six hundred forty-four".