20161644315 has 16 divisors (see below), whose sum is σ = 32805388800. Its totient is φ = 10570624352.

The previous prime is 20161644311. The next prime is 20161644329. The reversal of 20161644315 is 51344616102.

It is a cyclic number.

It is not a de Polignac number, because 20161644315 - 2² = 20161644311 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20161644311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11389875 + ... + 11391644.

It is an arithmetic number, because the mean of its divisors is an integer number (2050336800).

Almost surely, 2^20161644315 is an apocalyptic number.

20161644315 is a deficient number, since it is larger than the sum of its proper divisors (12643744485).

20161644315 is a wasteful number, since it uses less digits than its factorization.

20161644315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22781586.

The product of its (nonzero) digits is 17280, while the sum is 33.

The spelling of 20161644315 in words is "twenty billion, one hundred sixty-one million, six hundred forty-four thousand, three hundred fifteen".