2649420439920 has 400 divisors, whose sum is σ = 9640299981312. Its totient is φ = 673092288000.

The previous prime is 2649420439903. The next prime is 2649420439979. The reversal of 2649420439920 is 299340249462.

2649420439920 is a `hidden beast` number, since 2 + 6 + 49 + 4 + 204 + 399 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 37373629 + ... + 37444451.

Almost surely, 2^{2649420439920} is an apocalyptic number.

2649420439920 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 2649420439920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4820149990656).

2649420439920 is an abundant number, since it is smaller than the sum of its proper divisors (6990879541392).

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

2649420439920 is a wasteful number, since it uses less digits than its factorization.

2649420439920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71122 (or 71107 counting only the distinct ones).

The product of its (nonzero) digits is 6718464, while the sum is 54.

The spelling of 2649420439920 in words is "two trillion, six hundred forty-nine billion, four hundred twenty million, four hundred thirty-nine thousand, nine hundred twenty".