155161101000 has 128 divisors (see below), whose sum is σ = 484863874560. Its totient is φ = 41311232000.

The previous prime is 155161100981. The next prime is 155161101001. The reversal of 155161101000 is 101161551.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (155161101001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1882657 + ... + 1963343.

It is an arithmetic number, because the mean of its divisors is an integer number (3787999020).

Almost surely, 2^155161101000 is an apocalyptic number.

155161101000 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 155161101000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (242431937280).

155161101000 is an abundant number, since it is smaller than the sum of its proper divisors (329702773560).

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

155161101000 is a wasteful number, since it uses less digits than its factorization.

155161101000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81352 (or 81338 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 21.

Adding to 155161101000 its reverse (101161551), we get a palindrome (155262262551).

The spelling of 155161101000 in words is "one hundred fifty-five billion, one hundred sixty-one million, one hundred one thousand".