16858639793745 has 64 divisors (see below), whose sum is σ = 30188072551680. Its totient is φ = 8926339968000.

The previous prime is 16858639793741. The next prime is 16858639793761. The reversal of 16858639793745 is 54739793685861.

16858639793745 is a `hidden beast` number, since 1 + 6 + 85 + 86 + 3 + 97 + 9 + 374 + 5 = 666.

It is not a de Polignac number, because 16858639793745 - 2² = 16858639793741 is a prime.

It is a super-2 number, since 2×16858639793745² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16858639793741) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10684527 + ... + 12160443.

It is an arithmetic number, because the mean of its divisors is an integer number (471688633620).

Almost surely, 2^{16858639793745} is an apocalyptic number.

16858639793745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16858639793745 is a deficient number, since it is larger than the sum of its proper divisors (13329432757935).

16858639793745 is a wasteful number, since it uses less digits than its factorization.

16858639793745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1476543 (or 1476537 counting only the distinct ones).

The product of its digits is 8230118400, while the sum is 81.

The spelling of 16858639793745 in words is "sixteen trillion, eight hundred fifty-eight billion, six hundred thirty-nine million, seven hundred ninety-three thousand, seven hundred forty-five".