85668836542 has 16 divisors (see below), whose sum is σ = 136088242560. Its totient is φ = 40307051008.

The previous prime is 85668836387. The next prime is 85668836543. The reversal of 85668836542 is 24563886658.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85668836543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57742 + ... + 417937.

It is an arithmetic number, because the mean of its divisors is an integer number (8505515160).

Almost surely, 2^85668836542 is an apocalyptic number.

85668836542 is a deficient number, since it is larger than the sum of its proper divisors (50419406018).

85668836542 is a wasteful number, since it uses less digits than its factorization.

85668836542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480995.

The product of its digits is 66355200, while the sum is 61.

The spelling of 85668836542 in words is "eighty-five billion, six hundred sixty-eight million, eight hundred thirty-six thousand, five hundred forty-two".