26640507263 has 8 divisors (see below), whose sum is σ = 26792918880. Its totient is φ = 26488153440.

The previous prime is 26640507211. The next prime is 26640507277. The reversal of 26640507263 is 36270504662.

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

It is a cyclic number.

It is not a de Polignac number, because 26640507263 - 2¹⁶ = 26640441727 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26640507263.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26640507463) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1197881 + ... + 1219917.

It is an arithmetic number, because the mean of its divisors is an integer number (3349114860).

Almost surely, 2^26640507263 is an apocalyptic number.

26640507263 is a deficient number, since it is larger than the sum of its proper divisors (152411617).

26640507263 is a wasteful number, since it uses less digits than its factorization.

26640507263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28897.

The product of its (nonzero) digits is 362880, while the sum is 41.

The spelling of 26640507263 in words is "twenty-six billion, six hundred forty million, five hundred seven thousand, two hundred sixty-three".