155326287090 has 128 divisors (see below), whose sum is σ = 432427548672. Its totient is φ = 35392008960.

The previous prime is 155326287043. The next prime is 155326287091. The reversal of 155326287090 is 90782623551.

It is a super-2 number, since 2×155326287090² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (155326287091) 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, 1224 + ... + 557363.

It is an arithmetic number, because the mean of its divisors is an integer number (3378340224).

Almost surely, 2^155326287090 is an apocalyptic number.

155326287090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 155326287090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (216213774336).

155326287090 is an abundant number, since it is smaller than the sum of its proper divisors (277101261582).

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

155326287090 is a wasteful number, since it uses less digits than its factorization.

155326287090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558664.

The product of its (nonzero) digits is 907200, while the sum is 48.

The spelling of 155326287090 in words is "one hundred fifty-five billion, three hundred twenty-six million, two hundred eighty-seven thousand, ninety".