85907781696 has 224 divisors, whose sum is σ = 251221378176. Its totient is φ = 25692160000.

The previous prime is 85907781649. The next prime is 85907781719. The reversal of 85907781696 is 69618770958.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 111135166 + ... + 111135938.

Almost surely, 2^85907781696 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 85907781696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125610689088).

85907781696 is an abundant number, since it is smaller than the sum of its proper divisors (165313596480).

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

85907781696 is a wasteful number, since it uses less digits than its factorization.

85907781696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1421 (or 1411 counting only the distinct ones).

The product of its (nonzero) digits is 45722880, while the sum is 66.

The spelling of 85907781696 in words is "eighty-five billion, nine hundred seven million, seven hundred eighty-one thousand, six hundred ninety-six".