26501501265 has 32 divisors (see below), whose sum is σ = 43080067200. Its totient is φ = 13908685824.

The previous prime is 26501501261. The next prime is 26501501291. The reversal of 26501501265 is 56210510562.

It is not a de Polignac number, because 26501501265 - 2² = 26501501261 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26501501261) 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 31 ways as a sum of consecutive naturals, for example, 988761 + ... + 1015209.

It is an arithmetic number, because the mean of its divisors is an integer number (1346252100).

Almost surely, 2^26501501265 is an apocalyptic number.

It is an amenable number.

26501501265 is a deficient number, since it is larger than the sum of its proper divisors (16578565935).

26501501265 is a wasteful number, since it uses less digits than its factorization.

26501501265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27521.

The product of its (nonzero) digits is 18000, while the sum is 33.

The spelling of 26501501265 in words is "twenty-six billion, five hundred one million, five hundred one thousand, two hundred sixty-five".