10251813538 has 4 divisors (see below), whose sum is σ = 15377720310. Its totient is φ = 5125906768.

The previous prime is 10251813497. The next prime is 10251813541. The reversal of 10251813538 is 83531815201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83531815201 = 13721 ⋅6087881.

It can be written as a sum of positive squares in only one way, i.e., 7750513369 + 2501300169 = 88037^2 + 50013^2 .

It is a junction number, because it is equal to n+sod(n) for n = 10251813497 and 10251813506.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2562953383 + ... + 2562953386.

Almost surely, 2^10251813538 is an apocalyptic number.

10251813538 is a deficient number, since it is larger than the sum of its proper divisors (5125906772).

10251813538 is an equidigital number, since it uses as much as digits as its factorization.

10251813538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5125906771.

The product of its (nonzero) digits is 28800, while the sum is 37.

The spelling of 10251813538 in words is "ten billion, two hundred fifty-one million, eight hundred thirteen thousand, five hundred thirty-eight".