3985398749673 has 128 divisors (see below), whose sum is σ = 6993314496000. Its totient is φ = 2215629619200.

The previous prime is 3985398749669. The next prime is 3985398749723. The reversal of 3985398749673 is 3769478935893.

3985398749673 is a `hidden beast` number, since 3 + 9 + 8 + 5 + 398 + 74 + 96 + 73 = 666.

It is not a de Polignac number, because 3985398749673 - 2² = 3985398749669 is a prime.

It is a super-2 number, since 2×3985398749673² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3985398749592 and 3985398749601.

It is not an unprimeable number, because it can be changed into a prime (3985398749873) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 217143265 + ... + 217161617.

It is an arithmetic number, because the mean of its divisors is an integer number (54635269500).

Almost surely, 2^{3985398749673} is an apocalyptic number.

3985398749673 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

3985398749673 is a deficient number, since it is larger than the sum of its proper divisors (3007915746327).

3985398749673 is a wasteful number, since it uses less digits than its factorization.

3985398749673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19480 (or 19474 counting only the distinct ones).

The product of its digits is 7407106560, while the sum is 81.

The spelling of 3985398749673 in words is "three trillion, nine hundred eighty-five billion, three hundred ninety-eight million, seven hundred forty-nine thousand, six hundred seventy-three".