105307865842 has 4 divisors (see below), whose sum is σ = 157961798766. Its totient is φ = 52653932920.

The previous prime is 105307865821. The next prime is 105307865843. The reversal of 105307865842 is 248568703501.

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: 248568703501 = 1511 ⋅164506091.

It can be written as a sum of positive squares in only one way, i.e., 87391775641 + 17916090201 = 295621^2 + 133851^2 .

It is a super-2 number, since 2×105307865842² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (105307865843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26326966459 + ... + 26326966462.

Almost surely, 2^105307865842 is an apocalyptic number.

105307865842 is a deficient number, since it is larger than the sum of its proper divisors (52653932924).

105307865842 is an equidigital number, since it uses as much as digits as its factorization.

105307865842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52653932923.

The product of its (nonzero) digits is 1612800, while the sum is 49.

The spelling of 105307865842 in words is "one hundred five billion, three hundred seven million, eight hundred sixty-five thousand, eight hundred forty-two".