26564163550 has 24 divisors (see below), whose sum is σ = 49431503592. Its totient is φ = 10620900000.

The previous prime is 26564163547. The next prime is 26564163553. The reversal of 26564163550 is 5536146562.

It is an interprime number because it is at equal distance from previous prime (26564163547) and next prime (26564163553).

It is a super-2 number, since 2×26564163550² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 26564163497 and 26564163506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26564163553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5461 + ... + 230560.

It is an arithmetic number, because the mean of its divisors is an integer number (2059645983).

Almost surely, 2^26564163550 is an apocalyptic number.

26564163550 is a deficient number, since it is larger than the sum of its proper divisors (22867340042).

26564163550 is a wasteful number, since it uses less digits than its factorization.

26564163550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238284 (or 238279 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 43.

The spelling of 26564163550 in words is "twenty-six billion, five hundred sixty-four million, one hundred sixty-three thousand, five hundred fifty".