155298553938 has 160 divisors (see below), whose sum is σ = 400357520640. Its totient is φ = 44498665440.

The previous prime is 155298553937. The next prime is 155298553939. The reversal of 155298553938 is 839355892551.

155298553938 is a `hidden beast` number, since 1 + 5 + 5 + 2 + 98 + 5 + 539 + 3 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (155298553937) and next prime (155298553939).

It is not an unprimeable number, because it can be changed into a prime (155298553931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 19057981 + ... + 19066127.

It is an arithmetic number, because the mean of its divisors is an integer number (2502234504).

Almost surely, 2^155298553938 is an apocalyptic number.

155298553938 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 155298553938, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (200178760320).

155298553938 is an abundant number, since it is smaller than the sum of its proper divisors (245058966702).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155298553938 is a wasteful number, since it uses less digits than its factorization.

155298553938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8754 (or 8745 counting only the distinct ones).

The product of its digits is 58320000, while the sum is 63.

The spelling of 155298553938 in words is "one hundred fifty-five billion, two hundred ninety-eight million, five hundred fifty-three thousand, nine hundred thirty-eight".