2155882873640 has 64 divisors (see below), whose sum is σ = 4897188806400. Its totient is φ = 854101262592.

The previous prime is 2155882873607. The next prime is 2155882873657. The reversal of 2155882873640 is 463782885512.

It is a self number, because there is not a number n which added to its sum of digits gives 2155882873640.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10990259 + ... + 11184701.

It is an arithmetic number, because the mean of its divisors is an integer number (76518575100).

Almost surely, 2^{2155882873640} is an apocalyptic number.

2155882873640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2155882873640 is an abundant number, since it is smaller than the sum of its proper divisors (2741305932760).

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

2155882873640 is a wasteful number, since it uses less digits than its factorization.

2155882873640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197106 (or 197102 counting only the distinct ones).

The product of its (nonzero) digits is 25804800, while the sum is 59.

The spelling of 2155882873640 in words is "two trillion, one hundred fifty-five billion, eight hundred eighty-two million, eight hundred seventy-three thousand, six hundred forty".