85491749661 has 16 divisors (see below), whose sum is σ = 115139641344. Its totient is φ = 56419601904.

The previous prime is 85491749657. The next prime is 85491749663. The reversal of 85491749661 is 16694719458.

It is not a de Polignac number, because 85491749661 - 2² = 85491749657 is a prime.

It is a super-2 number, since 2×85491749661² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 85491749595 and 85491749604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85491749663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 778800 + ... + 881766.

It is an arithmetic number, because the mean of its divisors is an integer number (7196227584).

Almost surely, 2^85491749661 is an apocalyptic number.

It is an amenable number.

85491749661 is a deficient number, since it is larger than the sum of its proper divisors (29647891683).

85491749661 is a wasteful number, since it uses less digits than its factorization.

85491749661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105760.

The product of its digits is 13063680, while the sum is 60.

The spelling of 85491749661 in words is "eighty-five billion, four hundred ninety-one million, seven hundred forty-nine thousand, six hundred sixty-one".