155116881920 has 768 divisors, whose sum is σ = 514484006400. Its totient is φ = 43316674560.

The previous prime is 155116881841. The next prime is 155116881929. The reversal of 155116881920 is 29188611551.

It is a super-2 number, since 2×155116881920² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (155116881929) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 379258676 + ... + 379259084.

It is an arithmetic number, because the mean of its divisors is an integer number (669901050).

Almost surely, 2^155116881920 is an apocalyptic number.

155116881920 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 155116881920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (257242003200).

155116881920 is an abundant number, since it is smaller than the sum of its proper divisors (359367124480).

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

155116881920 is a wasteful number, since it uses less digits than its factorization.

155116881920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504 (or 484 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 47.

The spelling of 155116881920 in words is "one hundred fifty-five billion, one hundred sixteen million, eight hundred eighty-one thousand, nine hundred twenty".