155881245643 has 32 divisors (see below), whose sum is σ = 166637995200. Its totient is φ = 145537007616.

The previous prime is 155881245631. The next prime is 155881245659. The reversal of 155881245643 is 346542188551.

It is not a de Polignac number, because 155881245643 - 2²⁵ = 155847691211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155881245623) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 167794203 + ... + 167795131.

It is an arithmetic number, because the mean of its divisors is an integer number (5207437350).

Almost surely, 2^155881245643 is an apocalyptic number.

155881245643 is a deficient number, since it is larger than the sum of its proper divisors (10756749557).

155881245643 is a wasteful number, since it uses less digits than its factorization.

155881245643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1791.

The product of its digits is 4608000, while the sum is 52.

The spelling of 155881245643 in words is "one hundred fifty-five billion, eight hundred eighty-one million, two hundred forty-five thousand, six hundred forty-three".