2158189803612 has 36 divisors (see below), whose sum is σ = 5455804097016. Its totient is φ = 719346508320.

The previous prime is 2158189803611. The next prime is 2158189803619. The reversal of 2158189803612 is 2163089818512.

2158189803612 is a `hidden beast` number, since 2 + 1 + 5 + 8 + 18 + 9 + 8 + 0 + 3 + 612 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2158189803611) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1561203 + ... + 2598794.

It is an arithmetic number, because the mean of its divisors is an integer number (151550113806).

Almost surely, 2^{2158189803612} is an apocalyptic number.

It is an amenable number.

2158189803612 is an abundant number, since it is smaller than the sum of its proper divisors (3297614293404).

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

2158189803612 is a wasteful number, since it uses less digits than its factorization.

2158189803612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4174418 (or 4174413 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 54.

The spelling of 2158189803612 in words is "two trillion, one hundred fifty-eight billion, one hundred eighty-nine million, eight hundred three thousand, six hundred twelve".