7857777728252 has 24 divisors (see below), whose sum is σ = 14584214696352. Its totient is φ = 3696459940800.

The previous prime is 7857777728237. The next prime is 7857777728293. The reversal of 7857777728252 is 2528277777587.

It is a super-2 number, since 2×7857777728252² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7857777728252.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 700081499 + ... + 700092722.

It is an arithmetic number, because the mean of its divisors is an integer number (607675612348).

Almost surely, 2^{7857777728252} is an apocalyptic number.

It is an amenable number.

7857777728252 is a deficient number, since it is larger than the sum of its proper divisors (6726436968100).

7857777728252 is a wasteful number, since it uses less digits than its factorization.

7857777728252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1400174309 (or 1400174307 counting only the distinct ones).

The product of its digits is 1505907200, while the sum is 74.

The spelling of 7857777728252 in words is "seven trillion, eight hundred fifty-seven billion, seven hundred seventy-seven million, seven hundred twenty-eight thousand, two hundred fifty-two".