2155432505340 has 48 divisors (see below), whose sum is σ = 6036599469600. Its totient is φ = 574649767680.

The previous prime is 2155432505321. The next prime is 2155432505363. The reversal of 2155432505340 is 435052345512.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3869191 + ... + 4391070.

It is an arithmetic number, because the mean of its divisors is an integer number (125762488950).

Almost surely, 2^{2155432505340} is an apocalyptic number.

2155432505340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2155432505340 is an abundant number, since it is smaller than the sum of its proper divisors (3881166964260).

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

2155432505340 is a wasteful number, since it uses less digits than its factorization.

2155432505340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8264622 (or 8264620 counting only the distinct ones).

The product of its (nonzero) digits is 360000, while the sum is 39.

The spelling of 2155432505340 in words is "two trillion, one hundred fifty-five billion, four hundred thirty-two million, five hundred five thousand, three hundred forty".