12649372380 has 72 divisors (see below), whose sum is σ = 38479896000. Its totient is φ = 3363484032.

The previous prime is 12649372369. The next prime is 12649372409. The reversal of 12649372380 is 8327394621.

12649372380 is a `hidden beast` number, since 1 + 264 + 9 + 3 + 7 + 2 + 380 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37860 + ... + 163499.

It is an arithmetic number, because the mean of its divisors is an integer number (534443000).

Almost surely, 2^12649372380 is an apocalyptic number.

12649372380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12649372380 is an abundant number, since it is smaller than the sum of its proper divisors (25830523620).

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

12649372380 is a wasteful number, since it uses less digits than its factorization.

12649372380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201723 (or 201718 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The spelling of 12649372380 in words is "twelve billion, six hundred forty-nine million, three hundred seventy-two thousand, three hundred eighty".