1985612715 has 12 divisors (see below), whose sum is σ = 3441728784. Its totient is φ = 1058993424.

The previous prime is 1985612711. The next prime is 1985612743. The reversal of 1985612715 is 5172165891.

1985612715 is a `hidden beast` number, since 19 + 8 + 5 + 612 + 7 + 15 = 666.

It is not a de Polignac number, because 1985612715 - 2² = 1985612711 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 44124727 = 1985612715 / (1 + 9 + 8 + 5 + 6 + 1 + 2 + 7 + 1 + 5).

It is not an unprimeable number, because it can be changed into a prime (1985612711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22062319 + ... + 22062408.

It is an arithmetic number, because the mean of its divisors is an integer number (286810732).

Almost surely, 2^1985612715 is an apocalyptic number.

1985612715 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1985612715 is a deficient number, since it is larger than the sum of its proper divisors (1456116069).

1985612715 is a wasteful number, since it uses less digits than its factorization.

1985612715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44124738 (or 44124735 counting only the distinct ones).

The product of its digits is 151200, while the sum is 45.

The square root of 1985612715 is about 44560.2144855700. The cubic root of 1985612715 is about 1256.8926359315.

The spelling of 1985612715 in words is "one billion, nine hundred eighty-five million, six hundred twelve thousand, seven hundred fifteen".