85099143731 has 6 divisors (see below), whose sum is σ = 98992881540. Its totient is φ = 72942123156.

The previous prime is 85099143697. The next prime is 85099143749. The reversal of 85099143731 is 13734199058.

It is not a de Polignac number, because 85099143731 - 2⁶ = 85099143667 is a prime.

It is a super-2 number, since 2×85099143731² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 85099143731.

It is not an unprimeable number, because it can be changed into a prime (85099143751) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 868358561 + ... + 868358658.

It is an arithmetic number, because the mean of its divisors is an integer number (16498813590).

Almost surely, 2^85099143731 is an apocalyptic number.

85099143731 is a deficient number, since it is larger than the sum of its proper divisors (13893737809).

85099143731 is a wasteful number, since it uses less digits than its factorization.

85099143731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1736717233 (or 1736717226 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 50.

The spelling of 85099143731 in words is "eighty-five billion, ninety-nine million, one hundred forty-three thousand, seven hundred thirty-one".