3985398749503 has 4 divisors (see below), whose sum is σ = 4219833970080. Its totient is φ = 3750963528928.

The previous prime is 3985398749467. The next prime is 3985398749533. The reversal of 3985398749503 is 3059478935893.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3985398749503 - 2²¹ = 3985396652351 is a prime.

It is a super-2 number, since 2×3985398749503² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3985398749533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117217610263 + ... + 117217610296.

It is an arithmetic number, because the mean of its divisors is an integer number (1054958492520).

Almost surely, 2^{3985398749503} is an apocalyptic number.

3985398749503 is a deficient number, since it is larger than the sum of its proper divisors (234435220577).

3985398749503 is a wasteful number, since it uses less digits than its factorization.

3985398749503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234435220576.

The product of its (nonzero) digits is 881798400, while the sum is 73.

The spelling of 3985398749503 in words is "three trillion, nine hundred eighty-five billion, three hundred ninety-eight million, seven hundred forty-nine thousand, five hundred three".