7857561252 has 48 divisors (see below), whose sum is σ = 18983946240. Its totient is φ = 2526547968.

The previous prime is 7857561251. The next prime is 7857561259. The reversal of 7857561252 is 2521657587.

It is not an unprimeable number, because it can be changed into a prime (7857561251) 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 15 ways as a sum of consecutive naturals, for example, 391453 + ... + 411035.

It is an arithmetic number, because the mean of its divisors is an integer number (395498880).

Almost surely, 2^7857561252 is an apocalyptic number.

It is an amenable number.

7857561252 is an abundant number, since it is smaller than the sum of its proper divisors (11126384988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7857561252 is a wasteful number, since it uses less digits than its factorization.

7857561252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20772 (or 20770 counting only the distinct ones).

The product of its digits is 1176000, while the sum is 48.

The square root of 7857561252 is about 88642.8860766616. The cubic root of 7857561252 is about 1988.0589519067.

The spelling of 7857561252 in words is "seven billion, eight hundred fifty-seven million, five hundred sixty-one thousand, two hundred fifty-two".