155115104100 has 144 divisors (see below), whose sum is σ = 489990680256. Its totient is φ = 37573632000.

The previous prime is 155115104051. The next prime is 155115104117. The reversal of 155115104100 is 1401511551.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4261980 + ... + 4298220.

Almost surely, 2^155115104100 is an apocalyptic number.

155115104100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155115104100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (244995340128).

155115104100 is an abundant number, since it is smaller than the sum of its proper divisors (334875576156).

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

155115104100 is a wasteful number, since it uses less digits than its factorization.

155115104100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37566 (or 37559 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 24.

Adding to 155115104100 its reverse (1401511551), we get a palindrome (156516615651).

The spelling of 155115104100 in words is "one hundred fifty-five billion, one hundred fifteen million, one hundred four thousand, one hundred".