10291252778 has 8 divisors (see below), whose sum is σ = 15453356772. Its totient is φ = 5140133856.

The previous prime is 10291252709. The next prime is 10291252781. The reversal of 10291252778 is 87725219201.

It can be written as a sum of positive squares in 2 ways, for example, as 6581590129 + 3709662649 = 81127^2 + 60907^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2743925 + ... + 2747672.

Almost surely, 2^10291252778 is an apocalyptic number.

10291252778 is a deficient number, since it is larger than the sum of its proper divisors (5162103994).

10291252778 is an equidigital number, since it uses as much as digits as its factorization.

10291252778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5492536.

The product of its (nonzero) digits is 141120, while the sum is 44.

The spelling of 10291252778 in words is "ten billion, two hundred ninety-one million, two hundred fifty-two thousand, seven hundred seventy-eight".