20172110615377 has 16 divisors (see below), whose sum is σ = 24810112086912. Its totient is φ = 16006523915520.

The previous prime is 20172110615323. The next prime is 20172110615381. The reversal of 20172110615377 is 77351601127102.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20172110615377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20172110612377) 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, 1389447943 + ... + 1389462460.

It is an arithmetic number, because the mean of its divisors is an integer number (1550632005432).

Almost surely, 2^{20172110615377} is an apocalyptic number.

It is an amenable number.

20172110615377 is a deficient number, since it is larger than the sum of its proper divisors (4638001471535).

20172110615377 is a wasteful number, since it uses less digits than its factorization.

20172110615377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2778910488.

The product of its (nonzero) digits is 123480, while the sum is 43.

The spelling of 20172110615377 in words is "twenty trillion, one hundred seventy-two billion, one hundred ten million, six hundred fifteen thousand, three hundred seventy-seven".