2173139245440 has 1536 divisors, whose sum is σ = 8853094080000. Its totient is φ = 501931966464.

The previous prime is 2173139245397. The next prime is 2173139245463. The reversal of 2173139245440 is 445429313712.

2173139245440 is a `hidden beast` number, since 2 + 1 + 7 + 3 + 13 + 92 + 4 + 544 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 3510725451 + ... + 3510726069.

It is an arithmetic number, because the mean of its divisors is an integer number (5763733125).

Almost surely, 2^{2173139245440} is an apocalyptic number.

2173139245440 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 2173139245440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4426547040000).

2173139245440 is an abundant number, since it is smaller than the sum of its proper divisors (6679954834560).

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

2173139245440 is a wasteful number, since it uses less digits than its factorization.

2173139245440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 737 (or 702 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The spelling of 2173139245440 in words is "two trillion, one hundred seventy-three billion, one hundred thirty-nine million, two hundred forty-five thousand, four hundred forty".