2155581672330 has 32 divisors (see below), whose sum is σ = 5174134205184. Its totient is φ = 574739758016.

The previous prime is 2155581672301. The next prime is 2155581672331. The reversal of 2155581672330 is 332761855512.

It is a self number, because there is not a number n which added to its sum of digits gives 2155581672330.

It is not an unprimeable number, because it can be changed into a prime (2155581672331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4912434 + ... + 5333213.

It is an arithmetic number, because the mean of its divisors is an integer number (161691693912).

Almost surely, 2^{2155581672330} is an apocalyptic number.

2155581672330 is an abundant number, since it is smaller than the sum of its proper divisors (3018552532854).

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

2155581672330 is a wasteful number, since it uses less digits than its factorization.

2155581672330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10252670.

The product of its (nonzero) digits is 1512000, while the sum is 48.

The spelling of 2155581672330 in words is "two trillion, one hundred fifty-five billion, five hundred eighty-one million, six hundred seventy-two thousand, three hundred thirty".