155256013136 has 30 divisors (see below), whose sum is σ = 349920123210. Its totient is φ = 66538291008.

The previous prime is 155256013127. The next prime is 155256013153. The reversal of 155256013136 is 631310652551.

It can be written as a sum of positive squares in only one way, i.e., 134583324736 + 20672688400 = 366856^2 + 143780^2 .

It is a super-2 number, since 2×155256013136² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 155256013136.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 99014531 + ... + 99016098.

It is an arithmetic number, because the mean of its divisors is an integer number (11664004107).

Almost surely, 2^155256013136 is an apocalyptic number.

155256013136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

155256013136 is an abundant number, since it is smaller than the sum of its proper divisors (194664110074).

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

155256013136 is a wasteful number, since it uses less digits than its factorization.

155256013136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198030651 (or 198030638 counting only the distinct ones).

The product of its (nonzero) digits is 81000, while the sum is 38.

Adding to 155256013136 its reverse (631310652551), we get a palindrome (786566665687).

The spelling of 155256013136 in words is "one hundred fifty-five billion, two hundred fifty-six million, thirteen thousand, one hundred thirty-six".