2163494700640 has 192 divisors, whose sum is σ = 6393907013760. Its totient is φ = 673485373440.

The previous prime is 2163494700599. The next prime is 2163494700649. The reversal of 2163494700640 is 460074943612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2163494700649) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 329805 + ... + 2106124.

It is an arithmetic number, because the mean of its divisors is an integer number (33301599030).

Almost surely, 2^{2163494700640} is an apocalyptic number.

2163494700640 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 2163494700640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3196953506880).

2163494700640 is an abundant number, since it is smaller than the sum of its proper divisors (4230412313120).

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

2163494700640 is a wasteful number, since it uses less digits than its factorization.

2163494700640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2436025 (or 2436017 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 46.

The spelling of 2163494700640 in words is "two trillion, one hundred sixty-three billion, four hundred ninety-four million, seven hundred thousand, six hundred forty".