155539999213632 has 1120 divisors, whose sum is σ = 528333781966848. Its totient is φ = 44818375680000.

The previous prime is 155539999213609. The next prime is 155539999213637. The reversal of 155539999213632 is 236312999935551.

155539999213632 is a `hidden beast` number, since 1 + 5 + 5 + 539 + 9 + 9 + 9 + 21 + 3 + 63 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is not an unprimeable number, because it can be changed into a prime (155539999213637) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 23852166532 + ... + 23852173052.

Almost surely, 2^{155539999213632} is an apocalyptic number.

155539999213632 is a gapful number since it is divisible by the number (12) 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 155539999213632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (264166890983424).

155539999213632 is an abundant number, since it is smaller than the sum of its proper divisors (372793782753216).

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

155539999213632 is a wasteful number, since it uses less digits than its factorization.

155539999213632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6821 (or 6802 counting only the distinct ones).

The product of its digits is 531441000, while the sum is 72.

The spelling of 155539999213632 in words is "one hundred fifty-five trillion, five hundred thirty-nine billion, nine hundred ninety-nine million, two hundred thirteen thousand, six hundred thirty-two".