85431407187 has 32 divisors (see below), whose sum is σ = 133863058432. Its totient is φ = 47440473984.

The previous prime is 85431407183. The next prime is 85431407213. The reversal of 85431407187 is 78170413458.

It is not a de Polignac number, because 85431407187 - 2² = 85431407183 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85431407183) 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 31 ways as a sum of consecutive naturals, for example, 572673 + ... + 706269.

It is an arithmetic number, because the mean of its divisors is an integer number (4183220576).

Almost surely, 2^85431407187 is an apocalyptic number.

85431407187 is a deficient number, since it is larger than the sum of its proper divisors (48431651245).

85431407187 is a wasteful number, since it uses less digits than its factorization.

85431407187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134467.

The product of its (nonzero) digits is 752640, while the sum is 48.

The spelling of 85431407187 in words is "eighty-five billion, four hundred thirty-one million, four hundred seven thousand, one hundred eighty-seven".