7851437949 has 8 divisors (see below), whose sum is σ = 10471985280. Its totient is φ = 5232591296.

The previous prime is 7851437939. The next prime is 7851438011. The reversal of 7851437949 is 9497341587.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 7851437949 - 2²³ = 7843049341 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7851437939) 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, 414357 + ... + 432890.

It is an arithmetic number, because the mean of its divisors is an integer number (1308998160).

Almost surely, 2^7851437949 is an apocalyptic number.

It is an amenable number.

7851437949 is a deficient number, since it is larger than the sum of its proper divisors (2620547331).

7851437949 is a wasteful number, since it uses less digits than its factorization.

7851437949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 850339.

The product of its digits is 7620480, while the sum is 57.

The square root of 7851437949 is about 88608.3401774348. The cubic root of 7851437949 is about 1987.5423942225.

The spelling of 7851437949 in words is "seven billion, eight hundred fifty-one million, four hundred thirty-seven thousand, nine hundred forty-nine".