85981421504 has 28 divisors (see below), whose sum is σ = 186130237848. Its totient is φ = 39082464000.

The previous prime is 85981421497. The next prime is 85981421507. The reversal of 85981421504 is 40512418958.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85981421507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61065647 + ... + 61067054.

Almost surely, 2^85981421504 is an apocalyptic number.

It is an amenable number.

85981421504 is an abundant number, since it is smaller than the sum of its proper divisors (100148816344).

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

85981421504 is a wasteful number, since it uses less digits than its factorization.

85981421504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122132724 (or 122132714 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 47.

The spelling of 85981421504 in words is "eighty-five billion, nine hundred eighty-one million, four hundred twenty-one thousand, five hundred four".