3999894646590 has 40 divisors (see below), whose sum is σ = 10755272274120. Its totient is φ = 1066638572208.

The previous prime is 3999894646567. The next prime is 3999894646609. The reversal of 3999894646590 is 956464989993.

3999894646590 is a `hidden beast` number, since 3 + 9 + 9 + 9 + 8 + 9 + 464 + 65 + 90 = 666.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2469069960 + ... + 2469071579.

It is an arithmetic number, because the mean of its divisors is an integer number (268881806853).

Almost surely, 2^{3999894646590} is an apocalyptic number.

3999894646590 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

3999894646590 is an abundant number, since it is smaller than the sum of its proper divisors (6755377627530).

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

3999894646590 is a wasteful number, since it uses less digits than its factorization.

3999894646590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4938141558 (or 4938141549 counting only the distinct ones).

The product of its (nonzero) digits is 4081466880, while the sum is 81.

The spelling of 3999894646590 in words is "three trillion, nine hundred ninety-nine billion, eight hundred ninety-four million, six hundred forty-six thousand, five hundred ninety".