26506894645 has 48 divisors (see below), whose sum is σ = 40055105664. Its totient is φ = 16483420800.

The previous prime is 26506894643. The next prime is 26506894669. The reversal of 26506894645 is 54649860562.

It is not a de Polignac number, because 26506894645 - 2¹ = 26506894643 is a prime.

It is a super-2 number, since 2×26506894645² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26506894643) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1775502 + ... + 1790368.

It is an arithmetic number, because the mean of its divisors is an integer number (834481368).

Almost surely, 2^26506894645 is an apocalyptic number.

It is an amenable number.

26506894645 is a deficient number, since it is larger than the sum of its proper divisors (13548211019).

26506894645 is a wasteful number, since it uses less digits than its factorization.

26506894645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15322 (or 15311 counting only the distinct ones).

The product of its (nonzero) digits is 12441600, while the sum is 55.

The spelling of 26506894645 in words is "twenty-six billion, five hundred six million, eight hundred ninety-four thousand, six hundred forty-five".