2529978857 has 8 divisors (see below), whose sum is σ = 2892724032. Its totient is φ = 2167563600.

The previous prime is 2529978853. The next prime is 2529978883. The reversal of 2529978857 is 7588799252.

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 2529978857 - 2² = 2529978853 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2529978857.

It is not an unprimeable number, because it can be changed into a prime (2529978853) 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 7 ways as a sum of consecutive naturals, for example, 65819 + ... + 96912.

It is an arithmetic number, because the mean of its divisors is an integer number (361590504).

Almost surely, 2^2529978857 is an apocalyptic number.

It is an amenable number.

2529978857 is a deficient number, since it is larger than the sum of its proper divisors (362745175).

2529978857 is a wasteful number, since it uses less digits than its factorization.

2529978857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164959.

The product of its digits is 25401600, while the sum is 62.

The square root of 2529978857 is about 50298.8951866738. The cubic root of 2529978857 is about 1362.6122760436.

The spelling of 2529978857 in words is "two billion, five hundred twenty-nine million, nine hundred seventy-eight thousand, eight hundred fifty-seven".