10405640026 has 4 divisors (see below), whose sum is σ = 15608460042. Its totient is φ = 5202820012.

The previous prime is 10405639991. The next prime is 10405640029. The reversal of 10405640026 is 62004650401.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 62004650401 = 263 ⋅235759127.

It can be written as a sum of positive squares in only one way, i.e., 9120059001 + 1285581025 = 95499^2 + 35855^2 .

It is a junction number, because it is equal to n+sod(n) for n = 10405639976 and 10405640003.

It is not an unprimeable number, because it can be changed into a prime (10405640029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2601410005 + ... + 2601410008.

Almost surely, 2^10405640026 is an apocalyptic number.

10405640026 is a deficient number, since it is larger than the sum of its proper divisors (5202820016).

10405640026 is an equidigital number, since it uses as much as digits as its factorization.

10405640026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5202820015.

The product of its (nonzero) digits is 5760, while the sum is 28.

The spelling of 10405640026 in words is "ten billion, four hundred five million, six hundred forty thousand, twenty-six".