3845899730257 has 8 divisors (see below), whose sum is σ = 4142019802536. Its totient is φ = 3549819891072.

The previous prime is 3845899730203. The next prime is 3845899730279. The reversal of 3845899730257 is 7520379985483.

It can be written as a sum of positive squares in 4 ways, for example, as 15115227136 + 3830784503121 = 122944^2 + 1957239^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-3845899730257 is a prime.

It is a super-2 number, since 2×3845899730257² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3845899730287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9859588 + ... + 10242229.

It is an arithmetic number, because the mean of its divisors is an integer number (517752475317).

Almost surely, 2^{3845899730257} is an apocalyptic number.

It is an amenable number.

3845899730257 is a deficient number, since it is larger than the sum of its proper divisors (296120072279).

3845899730257 is a wasteful number, since it uses less digits than its factorization.

3845899730257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20116547.

The product of its (nonzero) digits is 457228800, while the sum is 70.

The spelling of 3845899730257 in words is "three trillion, eight hundred forty-five billion, eight hundred ninety-nine million, seven hundred thirty thousand, two hundred fifty-seven".