10257720346 has 8 divisors (see below), whose sum is σ = 15387640884. Its totient is φ = 5128506720.

The previous prime is 10257720331. The next prime is 10257720349. The reversal of 10257720346 is 64302775201.

It is a happy number.

10257720346 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 10002200121 + 255520225 = 100011^2 + 15985^2 .

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

It is not an unprimeable number, because it can be changed into a prime (10257720349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138825 + ... + 199468.

Almost surely, 2^10257720346 is an apocalyptic number.

10257720346 is a deficient number, since it is larger than the sum of its proper divisors (5129920538).

10257720346 is a wasteful number, since it uses less digits than its factorization.

10257720346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353456.

The product of its (nonzero) digits is 70560, while the sum is 37.

The spelling of 10257720346 in words is "ten billion, two hundred fifty-seven million, seven hundred twenty thousand, three hundred forty-six".