85191666950 has 48 divisors (see below), whose sum is σ = 170993649456. Its totient is φ = 31391203200.

The previous prime is 85191666919. The next prime is 85191666961. The reversal of 85191666950 is 5966619158.

It is a happy number.

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 23 ways as a sum of consecutive naturals, for example, 185684 + ... + 452616.

It is an arithmetic number, because the mean of its divisors is an integer number (3562367697).

Almost surely, 2^85191666950 is an apocalyptic number.

85191666950 is an abundant number, since it is smaller than the sum of its proper divisors (85801982506).

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

85191666950 is a wasteful number, since it uses less digits than its factorization.

85191666950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267449 (or 267444 counting only the distinct ones).

The product of its (nonzero) digits is 3499200, while the sum is 56.

The spelling of 85191666950 in words is "eighty-five billion, one hundred ninety-one million, six hundred sixty-six thousand, nine hundred fifty".