2140644253140 has 144 divisors (see below), whose sum is σ = 6601551640320. Its totient is φ = 561325904640.

The previous prime is 2140644253067. The next prime is 2140644253169. The reversal of 2140644253140 is 413524460412.

2140644253140 is a `hidden beast` number, since 2 + 1 + 4 + 0 + 644 + 2 + 5 + 3 + 1 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 2140644253095 and 2140644253104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 43005747 + ... + 43055493.

Almost surely, 2^{2140644253140} is an apocalyptic number.

2140644253140 is a gapful number since it is divisible by the number (20) 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 2140644253140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3300775820160).

2140644253140 is an abundant number, since it is smaller than the sum of its proper divisors (4460907387180).

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

2140644253140 is a wasteful number, since it uses less digits than its factorization.

2140644253140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53742 (or 53737 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 36.

The spelling of 2140644253140 in words is "two trillion, one hundred forty billion, six hundred forty-four million, two hundred fifty-three thousand, one hundred forty".