1026886645 has 4 divisors (see below), whose sum is σ = 1232263980. Its totient is φ = 821509312.

The previous prime is 1026886639. The next prime is 1026886657. The reversal of 1026886645 is 5466886201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5466886201 = 7 ⋅780983743.

It can be written as a sum of positive squares in 2 ways, for example, as 476374276 + 550512369 = 21826^2 + 23463^2 .

It is a cyclic number.

It is not a de Polignac number, because 1026886645 - 2⁵ = 1026886613 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1026886595 and 1026886604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102688660 + ... + 102688669.

It is an arithmetic number, because the mean of its divisors is an integer number (308065995).

Almost surely, 2^1026886645 is an apocalyptic number.

It is an amenable number.

1026886645 is a deficient number, since it is larger than the sum of its proper divisors (205377335).

1026886645 is an equidigital number, since it uses as much as digits as its factorization.

1026886645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205377334.

The product of its (nonzero) digits is 552960, while the sum is 46.

The square root of 1026886645 is about 32045.0720860478. The cubic root of 1026886645 is about 1008.8830723738.

The spelling of 1026886645 in words is "one billion, twenty-six million, eight hundred eighty-six thousand, six hundred forty-five".