2155610989674 has 96 divisors (see below), whose sum is σ = 4927787504640. Its totient is φ = 706039606512.

The previous prime is 2155610989657. The next prime is 2155610989793. The reversal of 2155610989674 is 4769890165512.

2155610989674 is a `hidden beast` number, since 2 + 1 + 5 + 5 + 610 + 9 + 8 + 9 + 6 + 7 + 4 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 68314369 + ... + 68345915.

It is an arithmetic number, because the mean of its divisors is an integer number (51331119840).

Almost surely, 2^{2155610989674} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2155610989674, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2463893752320).

2155610989674 is an abundant number, since it is smaller than the sum of its proper divisors (2772176514966).

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

2155610989674 is a wasteful number, since it uses less digits than its factorization.

2155610989674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34006 (or 33994 counting only the distinct ones).

The product of its (nonzero) digits is 32659200, while the sum is 63.

The spelling of 2155610989674 in words is "two trillion, one hundred fifty-five billion, six hundred ten million, nine hundred eighty-nine thousand, six hundred seventy-four".