15055231870861 has 16 divisors (see below), whose sum is σ = 18533591766144. Its totient is φ = 11909211770304.

The previous prime is 15055231870841. The next prime is 15055231870867. The reversal of 15055231870861 is 16807813255051.

It is a cyclic number.

It is not a de Polignac number, because 15055231870861 - 2⁴³ = 6259138848653 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15055231870799 and 15055231870808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15055231870867) 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, 17778670 + ... + 18606223.

It is an arithmetic number, because the mean of its divisors is an integer number (1158349485384).

Almost surely, 2^{15055231870861} is an apocalyptic number.

It is an amenable number.

15055231870861 is a deficient number, since it is larger than the sum of its proper divisors (3478359895283).

15055231870861 is a wasteful number, since it uses less digits than its factorization.

15055231870861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36389460.

The product of its (nonzero) digits is 2016000, while the sum is 52.

The spelling of 15055231870861 in words is "fifteen trillion, fifty-five billion, two hundred thirty-one million, eight hundred seventy thousand, eight hundred sixty-one".