4205640623340 has 192 divisors, whose sum is σ = 13134580018560. Its totient is φ = 999532348416.

The previous prime is 4205640623309. The next prime is 4205640623363. The reversal of 4205640623340 is 433260465024.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 18912882 + ... + 19133958.

It is an arithmetic number, because the mean of its divisors is an integer number (68409270930).

Almost surely, 2^{4205640623340} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4205640623340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6567290009280).

4205640623340 is an abundant number, since it is smaller than the sum of its proper divisors (8928939395220).

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

4205640623340 is a wasteful number, since it uses less digits than its factorization.

4205640623340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221189 (or 221129 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 39.

The spelling of 4205640623340 in words is "four trillion, two hundred five billion, six hundred forty million, six hundred twenty-three thousand, three hundred forty".