4615891985 has 8 divisors (see below), whose sum is σ = 5545538856. Its totient is φ = 3688401280.

The previous prime is 4615891937. The next prime is 4615891991. The reversal of 4615891985 is 5891985164.

It can be written as a sum of positive squares in 4 ways, for example, as 2088215809 + 2527676176 = 45697^2 + 50276^2 .

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

It is not a de Polignac number, because 4615891985 - 2⁸ = 4615891729 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4615891985.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 534326 + ... + 542895.

It is an arithmetic number, because the mean of its divisors is an integer number (693192357).

Almost surely, 2^4615891985 is an apocalyptic number.

It is an amenable number.

4615891985 is a deficient number, since it is larger than the sum of its proper divisors (929646871).

4615891985 is a wasteful number, since it uses less digits than its factorization.

4615891985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1078083.

The product of its digits is 3110400, while the sum is 56.

The square root of 4615891985 is about 67940.3560853194. The cubic root of 4615891985 is about 1665.0165160521.

The spelling of 4615891985 in words is "four billion, six hundred fifteen million, eight hundred ninety-one thousand, nine hundred eighty-five".