26447536507 has 12 divisors (see below), whose sum is σ = 30875003496. Its totient is φ = 22588631520.

The previous prime is 26447536481. The next prime is 26447536537. The reversal of 26447536507 is 70563574462.

It is a de Polignac number, because none of the positive numbers 2^k-26447536507 is a prime.

It is a super-2 number, since 2×26447536507² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26447536537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 946633 + ... + 974170.

It is an arithmetic number, because the mean of its divisors is an integer number (2572916958).

Almost surely, 2^26447536507 is an apocalyptic number.

26447536507 is a deficient number, since it is larger than the sum of its proper divisors (4427466989).

26447536507 is a wasteful number, since it uses less digits than its factorization.

26447536507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1921098 (or 1921091 counting only the distinct ones).

The product of its (nonzero) digits is 4233600, while the sum is 49.

The spelling of 26447536507 in words is "twenty-six billion, four hundred forty-seven million, five hundred thirty-six thousand, five hundred seven".