155091040650 has 576 divisors, whose sum is σ = 550157287680. Its totient is φ = 30407270400.

The previous prime is 155091040609. The next prime is 155091040711. The reversal of 155091040650 is 56040190551.

155091040650 is a `hidden beast` number, since 1 + 550 + 9 + 1 + 0 + 40 + 65 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 41234770 + ... + 41238530.

It is an arithmetic number, because the mean of its divisors is an integer number (955134180).

Almost surely, 2^155091040650 is an apocalyptic number.

155091040650 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 155091040650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (275078643840).

155091040650 is an abundant number, since it is smaller than the sum of its proper divisors (395066247030).

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

155091040650 is a wasteful number, since it uses less digits than its factorization.

155091040650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3871 (or 3863 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The spelling of 155091040650 in words is "one hundred fifty-five billion, ninety-one million, forty thousand, six hundred fifty".