26501252649 has 8 divisors (see below), whose sum is σ = 37194740640. Its totient is φ = 16737633216.

The previous prime is 26501252629. The next prime is 26501252651. The reversal of 26501252649 is 94625210562.

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

It is not a de Polignac number, because 26501252649 - 2⁷ = 26501252521 is a prime.

It is a super-2 number, since 2×26501252649² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 26501252649.

It is not an unprimeable number, because it can be changed into a prime (26501252629) 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, 232467072 + ... + 232467185.

It is an arithmetic number, because the mean of its divisors is an integer number (4649342580).

Almost surely, 2^26501252649 is an apocalyptic number.

It is an amenable number.

26501252649 is a deficient number, since it is larger than the sum of its proper divisors (10693487991).

26501252649 is a wasteful number, since it uses less digits than its factorization.

26501252649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464934279.

The product of its (nonzero) digits is 259200, while the sum is 42.

The spelling of 26501252649 in words is "twenty-six billion, five hundred one million, two hundred fifty-two thousand, six hundred forty-nine".