85420986431 has 8 divisors (see below), whose sum is σ = 93245416704. Its totient is φ = 77606370520.

The previous prime is 85420986389. The next prime is 85420986449. The reversal of 85420986431 is 13468902458.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 85420986431 - 2¹⁰ = 85420985407 is a prime.

It is a super-2 number, since 2×85420986431² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 85420986431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85420986461) 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, 2435381 + ... + 2470206.

It is an arithmetic number, because the mean of its divisors is an integer number (11655677088).

Almost surely, 2^85420986431 is an apocalyptic number.

85420986431 is a deficient number, since it is larger than the sum of its proper divisors (7824430273).

85420986431 is a wasteful number, since it uses less digits than its factorization.

85420986431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4907181.

The product of its (nonzero) digits is 1658880, while the sum is 50.

The spelling of 85420986431 in words is "eighty-five billion, four hundred twenty million, nine hundred eighty-six thousand, four hundred thirty-one".