999739006420 has 96 divisors (see below), whose sum is σ = 2618087141376. Its totient is φ = 311536886400.

The previous prime is 999739006403. The next prime is 999739006421. The reversal of 999739006420 is 24600937999.

999739006420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-5 number, since 5×999739006420⁵ (a number of 61 digits) contains 55555 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999739006421) 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, 6999439 + ... + 7140841.

It is an arithmetic number, because the mean of its divisors is an integer number (27271741056).

Almost surely, 2^999739006420 is an apocalyptic number.

It is an amenable number.

999739006420 is an abundant number, since it is smaller than the sum of its proper divisors (1618348134956).

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

999739006420 is a wasteful number, since it uses less digits than its factorization.

999739006420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146021 (or 146019 counting only the distinct ones).

The product of its (nonzero) digits is 6613488, while the sum is 58.

The spelling of 999739006420 in words is "nine hundred ninety-nine billion, seven hundred thirty-nine million, six thousand, four hundred twenty".