155311273452180 has 48 divisors (see below), whose sum is σ = 434872326571200. Its totient is φ = 41416267120128.

The previous prime is 155311273452163. The next prime is 155311273452187. The reversal of 155311273452180 is 81254372113551.

It is a super-2 number, since 2×155311273452180² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155311273452187) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38324671 + ... + 42182969.

It is an arithmetic number, because the mean of its divisors is an integer number (9059840136900).

Almost surely, 2^{155311273452180} is an apocalyptic number.

155311273452180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155311273452180 is an abundant number, since it is smaller than the sum of its proper divisors (279561053119020).

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

155311273452180 is a wasteful number, since it uses less digits than its factorization.

155311273452180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4529208 (or 4529206 counting only the distinct ones).

The product of its (nonzero) digits is 1008000, while the sum is 48.

The spelling of 155311273452180 in words is "one hundred fifty-five trillion, three hundred eleven billion, two hundred seventy-three million, four hundred fifty-two thousand, one hundred eighty".