1285918016 has 14 divisors (see below), whose sum is σ = 2551743690. Its totient is φ = 642958976.

The previous prime is 1285918009. The next prime is 1285918021. The reversal of 1285918016 is 6108195821.

It can be written as a sum of positive squares in only one way, i.e., 858255616 + 427662400 = 29296^2 + 20680^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10046171 + ... + 10046298.

Almost surely, 2^1285918016 is an apocalyptic number.

1285918016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1285918016 is a deficient number, since it is larger than the sum of its proper divisors (1265825674).

1285918016 is an equidigital number, since it uses as much as digits as its factorization.

1285918016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20092481 (or 20092471 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 41.

The square root of 1285918016 is about 35859.6990506055. The cubic root of 1285918016 is about 1087.4378042732.

The spelling of 1285918016 in words is "one billion, two hundred eighty-five million, nine hundred eighteen thousand, sixteen".