85498917979 has 16 divisors (see below), whose sum is σ = 90915501600. Its totient is φ = 80250718464.

The previous prime is 85498917971. The next prime is 85498917997. The reversal of 85498917979 is 97971989458.

It is a cyclic number.

It is not a de Polignac number, because 85498917979 - 2³ = 85498917971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85498917971) 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 15 ways as a sum of consecutive naturals, for example, 1240087 + ... + 1307215.

It is an arithmetic number, because the mean of its divisors is an integer number (5682218850).

Almost surely, 2^85498917979 is an apocalyptic number.

85498917979 is a deficient number, since it is larger than the sum of its proper divisors (5416583621).

85498917979 is a wasteful number, since it uses less digits than its factorization.

85498917979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68382.

The product of its digits is 411505920, while the sum is 76.

The spelling of 85498917979 in words is "eighty-five billion, four hundred ninety-eight million, nine hundred seventeen thousand, nine hundred seventy-nine".