85443879747 has 32 divisors (see below), whose sum is σ = 117516672000. Its totient is φ = 55187516160.

The previous prime is 85443879721. The next prime is 85443879761. The reversal of 85443879747 is 74797834458.

It is not a de Polignac number, because 85443879747 - 2¹⁸ = 85443617603 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85443878747) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11137629 + ... + 11145297.

It is an arithmetic number, because the mean of its divisors is an integer number (3672396000).

Almost surely, 2^85443879747 is an apocalyptic number.

85443879747 is a deficient number, since it is larger than the sum of its proper divisors (32072792253).

85443879747 is a wasteful number, since it uses less digits than its factorization.

85443879747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8331.

The product of its digits is 189665280, while the sum is 66.

The spelling of 85443879747 in words is "eighty-five billion, four hundred forty-three million, eight hundred seventy-nine thousand, seven hundred forty-seven".