85407847772 has 96 divisors (see below), whose sum is σ = 166558714560. Its totient is φ = 38077931520.

The previous prime is 85407847757. The next prime is 85407847781. The reversal of 85407847772 is 27774870458.

It is a super-2 number, since 2×85407847772² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42767078 + ... + 42769074.

It is an arithmetic number, because the mean of its divisors is an integer number (1734986610).

Almost surely, 2^85407847772 is an apocalyptic number.

It is an amenable number.

85407847772 is a deficient number, since it is larger than the sum of its proper divisors (81150866788).

85407847772 is a wasteful number, since it uses less digits than its factorization.

85407847772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2311 (or 2309 counting only the distinct ones).

The product of its (nonzero) digits is 24586240, while the sum is 59.

The spelling of 85407847772 in words is "eighty-five billion, four hundred seven million, eight hundred forty-seven thousand, seven hundred seventy-two".