12525826778 has 8 divisors (see below), whose sum is σ = 18961114260. Its totient is φ = 6205455360.

The previous prime is 12525826723. The next prime is 12525826829. The reversal of 12525826778 is 87762852521.

It can be written as a sum of positive squares in 2 ways, for example, as 9764008969 + 2761817809 = 98813^2 + 52553^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×12525826778² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 28728743 + ... + 28729178.

Almost surely, 2^12525826778 is an apocalyptic number.

12525826778 is a deficient number, since it is larger than the sum of its proper divisors (6435287482).

12525826778 is a wasteful number, since it uses less digits than its factorization.

12525826778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57458032.

The product of its digits is 3763200, while the sum is 53.

The spelling of 12525826778 in words is "twelve billion, five hundred twenty-five million, eight hundred twenty-six thousand, seven hundred seventy-eight".