85729509500 has 48 divisors (see below), whose sum is σ = 187386937920. Its totient is φ = 34263656000.

The previous prime is 85729509451. The next prime is 85729509529. The reversal of 85729509500 is 590592758.

It is a super-2 number, since 2×85729509500² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 544745 + ... + 684255.

It is an arithmetic number, because the mean of its divisors is an integer number (3903894540).

Almost surely, 2^85729509500 is an apocalyptic number.

It is an amenable number.

85729509500 is an abundant number, since it is smaller than the sum of its proper divisors (101657428420).

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

85729509500 is a wasteful number, since it uses less digits than its factorization.

85729509500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140759 (or 140747 counting only the distinct ones).

The product of its (nonzero) digits is 1134000, while the sum is 50.

The spelling of 85729509500 in words is "eighty-five billion, seven hundred twenty-nine million, five hundred nine thousand, five hundred".