26420699664 has 160 divisors (see below), whose sum is σ = 77645724800. Its totient is φ = 8599011840.

The previous prime is 26420699647. The next prime is 26420699699. The reversal of 26420699664 is 46699602462.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 26420699664.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3659322 + ... + 3666534.

It is an arithmetic number, because the mean of its divisors is an integer number (485285780).

Almost surely, 2^26420699664 is an apocalyptic number.

26420699664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26420699664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38822862400).

26420699664 is an abundant number, since it is smaller than the sum of its proper divisors (51225025136).

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

26420699664 is a wasteful number, since it uses less digits than its factorization.

26420699664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7430 (or 7418 counting only the distinct ones).

The product of its (nonzero) digits is 6718464, while the sum is 54.

The spelling of 26420699664 in words is "twenty-six billion, four hundred twenty million, six hundred ninety-nine thousand, six hundred sixty-four".