12775026500 has 48 divisors (see below), whose sum is σ = 27922645296. Its totient is φ = 5105984000.

The previous prime is 12775026463. The next prime is 12775026527. The reversal of 12775026500 is 562057721.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 2008473856 + 10766552644 = 44816^2 + 103762^2 .

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, 671114 + ... + 689886.

It is an arithmetic number, because the mean of its divisors is an integer number (581721777).

Almost surely, 2^12775026500 is an apocalyptic number.

12775026500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12775026500 is an abundant number, since it is smaller than the sum of its proper divisors (15147618796).

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

12775026500 is a wasteful number, since it uses less digits than its factorization.

12775026500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20153 (or 20141 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 35.

The spelling of 12775026500 in words is "twelve billion, seven hundred seventy-five million, twenty-six thousand, five hundred".