42990704640 has 672 divisors, whose sum is σ = 166930742160. Its totient is φ = 10558439424.

The previous prime is 42990704579. The next prime is 42990704657. The reversal of 42990704640 is 4640709924.

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 55 ways as a sum of consecutive naturals, for example, 97044259 + ... + 97044701.

Almost surely, 2^42990704640 is an apocalyptic number.

42990704640 is a gapful number since it is divisible by the number (40) 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 42990704640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83465371080).

42990704640 is an abundant number, since it is smaller than the sum of its proper divisors (123940037520).

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

42990704640 is an equidigital number, since it uses as much as digits as its factorization.

42990704640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501 (or 466 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The spelling of 42990704640 in words is "forty-two billion, nine hundred ninety million, seven hundred four thousand, six hundred forty".