85102071649 has 4 divisors (see below), whose sum is σ = 97259510464. Its totient is φ = 72944632836.

The previous prime is 85102071583. The next prime is 85102071653. The reversal of 85102071649 is 94617020158.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 85102071649 - 2¹⁷ = 85101940577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85102074649) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 6078719397 + ... + 6078719410.

It is an arithmetic number, because the mean of its divisors is an integer number (24314877616).

Almost surely, 2^85102071649 is an apocalyptic number.

It is an amenable number.

85102071649 is a deficient number, since it is larger than the sum of its proper divisors (12157438815).

85102071649 is a wasteful number, since it uses less digits than its factorization.

85102071649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12157438814.

The product of its (nonzero) digits is 120960, while the sum is 43.

The spelling of 85102071649 in words is "eighty-five billion, one hundred two million, seventy-one thousand, six hundred forty-nine".