2851942509 has 12 divisors (see below), whose sum is σ = 4436355196. Its totient is φ = 1755041472.

The previous prime is 2851942501. The next prime is 2851942517. The reversal of 2851942509 is 9052491582.

It is a happy number.

2851942509 is a `hidden beast` number, since 2 + 8 + 51 + 94 + 2 + 509 = 666.

It is an interprime number because it is at equal distance from previous prime (2851942501) and next prime (2851942517).

It can be written as a sum of positive squares in 2 ways, for example, as 1377152100 + 1474790409 = 37110^2 + 38403^2 .

It is not a de Polignac number, because 2851942509 - 2³ = 2851942501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2851942501) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12187672 + ... + 12187905.

Almost surely, 2^2851942509 is an apocalyptic number.

It is an amenable number.

2851942509 is a deficient number, since it is larger than the sum of its proper divisors (1584412687).

2851942509 is a wasteful number, since it uses less digits than its factorization.

2851942509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24375596 (or 24375593 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 45.

The square root of 2851942509 is about 53403.5814248445. The cubic root of 2851942509 is about 1418.1219815517.

The spelling of 2851942509 in words is "two billion, eight hundred fifty-one million, nine hundred forty-two thousand, five hundred nine".