26309572649 has 8 divisors (see below), whose sum is σ = 27784233792. Its totient is φ = 24862475440.

The previous prime is 26309572561. The next prime is 26309572651. The reversal of 26309572649 is 94627590362.

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 26309572649 - 2¹⁶ = 26309507113 is a prime.

It is a super-2 number, since 2×26309572649² (a number of 22 digits) contains 22 as substring.

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 26309572649.

It is not an unprimeable number, because it can be changed into a prime (26309572049) 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, 6889022 + ... + 6892839.

It is an arithmetic number, because the mean of its divisors is an integer number (3473029224).

Almost surely, 2^26309572649 is an apocalyptic number.

It is an amenable number.

26309572649 is a deficient number, since it is larger than the sum of its proper divisors (1474661143).

26309572649 is a wasteful number, since it uses less digits than its factorization.

26309572649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13781967.

The product of its (nonzero) digits is 4898880, while the sum is 53.

The spelling of 26309572649 in words is "twenty-six billion, three hundred nine million, five hundred seventy-two thousand, six hundred forty-nine".