3999405911616 has 84 divisors (see below), whose sum is σ = 11470893138432. Its totient is φ = 1332284246784.

The previous prime is 3999405911603. The next prime is 3999405911621. The reversal of 3999405911616 is 6161195049993.

3999405911616 is a `hidden beast` number, since 3 + 9 + 9 + 9 + 4 + 0 + 5 + 9 + 1 + 1 + 616 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1312920 + ... + 3118103.

It is an arithmetic number, because the mean of its divisors is an integer number (136558251648).

Almost surely, 2^{3999405911616} is an apocalyptic number.

3999405911616 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

3999405911616 is an abundant number, since it is smaller than the sum of its proper divisors (7471487226816).

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

3999405911616 is a wasteful number, since it uses less digits than its factorization.

3999405911616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4432608 (or 4432595 counting only the distinct ones).

The product of its (nonzero) digits is 14171760, while the sum is 63.

The spelling of 3999405911616 in words is "three trillion, nine hundred ninety-nine billion, four hundred five million, nine hundred eleven thousand, six hundred sixteen".