85721743404 has 36 divisors (see below), whose sum is σ = 236384202600. Its totient is φ = 25976285760.

The previous prime is 85721743403. The next prime is 85721743441. The reversal of 85721743404 is 40434712758.

85721743404 is a `hidden beast` number, since 8 + 5 + 72 + 174 + 3 + 404 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 85721743404.

It is not an unprimeable number, because it can be changed into a prime (85721743403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 108234129 + ... + 108234920.

It is an arithmetic number, because the mean of its divisors is an integer number (6566227850).

Almost surely, 2^85721743404 is an apocalyptic number.

It is an amenable number.

85721743404 is an abundant number, since it is smaller than the sum of its proper divisors (150662459196).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85721743404 is a wasteful number, since it uses less digits than its factorization.

85721743404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216469070 (or 216469065 counting only the distinct ones).

The product of its (nonzero) digits is 752640, while the sum is 45.

The spelling of 85721743404 in words is "eighty-five billion, seven hundred twenty-one million, seven hundred forty-three thousand, four hundred four".