1985561315 has 8 divisors (see below), whose sum is σ = 2459534208. Its totient is φ = 1537208640.

The previous prime is 1985561311. The next prime is 1985561321. The reversal of 1985561315 is 5131655891.

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

It is not a de Polignac number, because 1985561315 - 2² = 1985561311 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1985561311) 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, 6404882 + ... + 6405191.

It is an arithmetic number, because the mean of its divisors is an integer number (307441776).

Almost surely, 2^1985561315 is an apocalyptic number.

1985561315 is a deficient number, since it is larger than the sum of its proper divisors (473972893).

1985561315 is a wasteful number, since it uses less digits than its factorization.

1985561315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12810109.

The product of its digits is 162000, while the sum is 44.

The square root of 1985561315 is about 44559.6377341648. The cubic root of 1985561315 is about 1256.8817904397.

The spelling of 1985561315 in words is "one billion, nine hundred eighty-five million, five hundred sixty-one thousand, three hundred fifteen".