26454540640 has 48 divisors (see below), whose sum is σ = 68180570640. Its totient is φ = 9619832320.

The previous prime is 26454540569. The next prime is 26454540691. The reversal of 26454540640 is 4604545462.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 26454540593 and 26454540602.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7513735 + ... + 7517254.

It is an arithmetic number, because the mean of its divisors is an integer number (1420428555).

Almost surely, 2^26454540640 is an apocalyptic number.

26454540640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26454540640 is an abundant number, since it is smaller than the sum of its proper divisors (41726030000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26454540640 is a wasteful number, since it uses less digits than its factorization.

26454540640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15031015 (or 15031007 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 40.

The spelling of 26454540640 in words is "twenty-six billion, four hundred fifty-four million, five hundred forty thousand, six hundred forty".