2443997521685 has 8 divisors (see below), whose sum is σ = 2933244752256. Its totient is φ = 1954899533200.

The previous prime is 2443997521639. The next prime is 2443997521687. The reversal of 2443997521685 is 5861257993442.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2443997521685 - 2¹⁸ = 2443997259541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2443997521687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37274489 + ... + 37339998.

It is an arithmetic number, because the mean of its divisors is an integer number (366655594032).

Almost surely, 2^{2443997521685} is an apocalyptic number.

It is an amenable number.

2443997521685 is a deficient number, since it is larger than the sum of its proper divisors (489247230571).

2443997521685 is an equidigital number, since it uses as much as digits as its factorization.

2443997521685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74621043.

The product of its digits is 130636800, while the sum is 65.

The spelling of 2443997521685 in words is "two trillion, four hundred forty-three billion, nine hundred ninety-seven million, five hundred twenty-one thousand, six hundred eighty-five".