155881334427 has 48 divisors (see below), whose sum is σ = 264259602432. Its totient is φ = 80995844160.

The previous prime is 155881334381. The next prime is 155881334489. The reversal of 155881334427 is 724433188551.

It is not a de Polignac number, because 155881334427 - 2⁸ = 155881334171 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 155881334427.

It is not an unprimeable number, because it can be changed into a prime (155881334327) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 480699 + ... + 736772.

It is an arithmetic number, because the mean of its divisors is an integer number (5505408384).

Almost surely, 2^155881334427 is an apocalyptic number.

155881334427 is a deficient number, since it is larger than the sum of its proper divisors (108378268005).

155881334427 is a wasteful number, since it uses less digits than its factorization.

155881334427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1217568 (or 1217561 counting only the distinct ones).

The product of its digits is 3225600, while the sum is 51.

The spelling of 155881334427 in words is "one hundred fifty-five billion, eight hundred eighty-one million, three hundred thirty-four thousand, four hundred twenty-seven".