86421585407 has 4 divisors (see below), whose sum is σ = 91505208096. Its totient is φ = 81337962720.

The previous prime is 86421585389. The next prime is 86421585409. The reversal of 86421585407 is 70458512468.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 86421585407 - 2¹⁰ = 86421584383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86421585409) 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, 2541811319 + ... + 2541811352.

It is an arithmetic number, because the mean of its divisors is an integer number (22876302024).

Almost surely, 2^86421585407 is an apocalyptic number.

86421585407 is a deficient number, since it is larger than the sum of its proper divisors (5083622689).

86421585407 is a wasteful number, since it uses less digits than its factorization.

86421585407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5083622688.

The product of its (nonzero) digits is 2150400, while the sum is 50.

The spelling of 86421585407 in words is "eighty-six billion, four hundred twenty-one million, five hundred eighty-five thousand, four hundred seven".