2255155387891 has 16 divisors (see below), whose sum is σ = 2648876085504. Its totient is φ = 1879719668064.

The previous prime is 2255155387889. The next prime is 2255155387987. The reversal of 2255155387891 is 1987835515522.

It is not a de Polignac number, because 2255155387891 - 2¹ = 2255155387889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2255155387801) 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, 16434340 + ... + 16570993.

It is an arithmetic number, because the mean of its divisors is an integer number (165554755344).

Almost surely, 2^{2255155387891} is an apocalyptic number.

2255155387891 is a deficient number, since it is larger than the sum of its proper divisors (393720697613).

2255155387891 is a wasteful number, since it uses less digits than its factorization.

2255155387891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33005610.

The product of its digits is 30240000, while the sum is 61.

The spelling of 2255155387891 in words is "two trillion, two hundred fifty-five billion, one hundred fifty-five million, three hundred eighty-seven thousand, eight hundred ninety-one".