85729437291 has 8 divisors (see below), whose sum is σ = 115354594960. Its totient is φ = 56628618912.

The previous prime is 85729437263. The next prime is 85729437301. The reversal of 85729437291 is 19273492758.

It is a happy number.

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

It is not a de Polignac number, because 85729437291 - 2¹⁹ = 85728913003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85729437221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131084440 + ... + 131085093.

It is an arithmetic number, because the mean of its divisors is an integer number (14419324370).

Almost surely, 2^85729437291 is an apocalyptic number.

85729437291 is a deficient number, since it is larger than the sum of its proper divisors (29625157669).

85729437291 is a wasteful number, since it uses less digits than its factorization.

85729437291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262169645.

The product of its digits is 7620480, while the sum is 57.

The spelling of 85729437291 in words is "eighty-five billion, seven hundred twenty-nine million, four hundred thirty-seven thousand, two hundred ninety-one".