26604404642 has 8 divisors (see below), whose sum is σ = 39934537500. Its totient is φ = 13292892144.

The previous prime is 26604404633. The next prime is 26604404719. The reversal of 26604404642 is 24640440662.

It can be written as a sum of positive squares in 2 ways, for example, as 26506770481 + 97634161 = 162809^2 + 9881^2 .

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

It is a super-2 number, since 2×26604404642² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 26604404596 and 26604404605.

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, 4651517 + ... + 4657232.

Almost surely, 2^26604404642 is an apocalyptic number.

26604404642 is a deficient number, since it is larger than the sum of its proper divisors (13330132858).

26604404642 is a wasteful number, since it uses less digits than its factorization.

26604404642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9310180.

The product of its (nonzero) digits is 221184, while the sum is 38.

The spelling of 26604404642 in words is "twenty-six billion, six hundred four million, four hundred four thousand, six hundred forty-two".