155438016057 has 24 divisors (see below), whose sum is σ = 235495917696. Its totient is φ = 98679443616.

The previous prime is 155438016049. The next prime is 155438016089. The reversal of 155438016057 is 750610834551.

155438016057 is a `hidden beast` number, since 1 + 5 + 5 + 4 + 38 + 0 + 1 + 605 + 7 = 666.

It is not a de Polignac number, because 155438016057 - 2³ = 155438016049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155438016157) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4950103 + ... + 4981404.

It is an arithmetic number, because the mean of its divisors is an integer number (9812329904).

Almost surely, 2^155438016057 is an apocalyptic number.

It is an amenable number.

155438016057 is a deficient number, since it is larger than the sum of its proper divisors (80057901639).

155438016057 is a wasteful number, since it uses less digits than its factorization.

155438016057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9931597 (or 9931594 counting only the distinct ones).

The product of its (nonzero) digits is 504000, while the sum is 45.

The spelling of 155438016057 in words is "one hundred fifty-five billion, four hundred thirty-eight million, sixteen thousand, fifty-seven".