155598381630 has 48 divisors (see below), whose sum is σ = 404575352064. Its totient is φ = 41490895680.

The previous prime is 155598381569. The next prime is 155598381689. The reversal of 155598381630 is 36183895551.

155598381630 is a `hidden beast` number, since 1 + 5 + 5 + 598 + 3 + 8 + 16 + 30 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3358020 + ... + 3404040.

It is an arithmetic number, because the mean of its divisors is an integer number (8428653168).

Almost surely, 2^155598381630 is an apocalyptic number.

155598381630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155598381630 is an abundant number, since it is smaller than the sum of its proper divisors (248976970434).

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

155598381630 is a wasteful number, since it uses less digits than its factorization.

155598381630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83601 (or 83598 counting only the distinct ones).

The product of its (nonzero) digits is 3888000, while the sum is 54.

The spelling of 155598381630 in words is "one hundred fifty-five billion, five hundred ninety-eight million, three hundred eighty-one thousand, six hundred thirty".