26420153640 has 64 divisors (see below), whose sum is σ = 80376831360. Its totient is φ = 6946141440.

The previous prime is 26420153497. The next prime is 26420153687. The reversal of 26420153640 is 4635102462.

It is a super-2 number, since 2×26420153640² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1541959 + ... + 1558998.

It is an arithmetic number, because the mean of its divisors is an integer number (1255887990).

Almost surely, 2^26420153640 is an apocalyptic number.

26420153640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26420153640 is an abundant number, since it is smaller than the sum of its proper divisors (53956677720).

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

26420153640 is a wasteful number, since it uses less digits than its factorization.

26420153640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3101042 (or 3101038 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

The spelling of 26420153640 in words is "twenty-six billion, four hundred twenty million, one hundred fifty-three thousand, six hundred forty".