26820961512 has 32 divisors (see below), whose sum is σ = 68188888800. Its totient is φ = 8788789184.

The previous prime is 26820961511. The next prime is 26820961529. The reversal of 26820961512 is 21516902862.

It is a super-2 number, since 2×26820961512² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (26820961511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9469263 + ... + 9472094.

It is an arithmetic number, because the mean of its divisors is an integer number (2130902775).

Almost surely, 2^26820961512 is an apocalyptic number.

It is an amenable number.

26820961512 is an abundant number, since it is smaller than the sum of its proper divisors (41367927288).

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

26820961512 is a wasteful number, since it uses less digits than its factorization.

26820961512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18941425 (or 18941421 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 42.

The spelling of 26820961512 in words is "twenty-six billion, eight hundred twenty million, nine hundred sixty-one thousand, five hundred twelve".