13012155644 has 12 divisors (see below), whose sum is σ = 23027130000. Its totient is φ = 6432975648.

The previous prime is 13012155601. The next prime is 13012155659. The reversal of 13012155644 is 44655121031.

It is a self number, because there is not a number n which added to its sum of digits gives 13012155644.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18275144 + ... + 18275855.

It is an arithmetic number, because the mean of its divisors is an integer number (1918927500).

Almost surely, 2^13012155644 is an apocalyptic number.

It is an amenable number.

13012155644 is a deficient number, since it is larger than the sum of its proper divisors (10014974356).

13012155644 is a wasteful number, since it uses less digits than its factorization.

13012155644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36551092 (or 36551090 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

Adding to 13012155644 its reverse (44655121031), we get a palindrome (57667276675).

The spelling of 13012155644 in words is "thirteen billion, twelve million, one hundred fifty-five thousand, six hundred forty-four".