7857479487 has 24 divisors (see below), whose sum is σ = 12401471152. Its totient is φ = 4395790080.

The previous prime is 7857479477. The next prime is 7857479503. The reversal of 7857479487 is 7849747587.

It is not a de Polignac number, because 7857479487 - 2¹⁵ = 7857446719 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7857479417) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 827818 + ... + 837255.

Almost surely, 2^7857479487 is an apocalyptic number.

7857479487 is a deficient number, since it is larger than the sum of its proper divisors (4543991665).

7857479487 is a wasteful number, since it uses less digits than its factorization.

7857479487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1665111 (or 1665100 counting only the distinct ones).

The product of its digits is 110638080, while the sum is 66.

The square root of 7857479487 is about 88642.4248709386. The cubic root of 7857479487 is about 1988.0520560349.

The spelling of 7857479487 in words is "seven billion, eight hundred fifty-seven million, four hundred seventy-nine thousand, four hundred eighty-seven".