85901815493 has 32 divisors (see below), whose sum is σ = 95535283200. Its totient is φ = 76725792000.

The previous prime is 85901815481. The next prime is 85901815589. The reversal of 85901815493 is 39451810958.

It is a happy number.

It is not a de Polignac number, because 85901815493 - 2⁶ = 85901815429 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 (85901815403) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 114382868 + ... + 114383618.

It is an arithmetic number, because the mean of its divisors is an integer number (2985477600).

Almost surely, 2^85901815493 is an apocalyptic number.

It is an amenable number.

85901815493 is a deficient number, since it is larger than the sum of its proper divisors (9633467707).

85901815493 is a wasteful number, since it uses less digits than its factorization.

85901815493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1797.

The product of its (nonzero) digits is 1555200, while the sum is 53.

The spelling of 85901815493 in words is "eighty-five billion, nine hundred one million, eight hundred fifteen thousand, four hundred ninety-three".