12402687845025 has 189 divisors, whose sum is σ = 24353665217769. Its totient is φ = 6262057045440.

The previous prime is 12402687845017. The next prime is 12402687845117. The reversal of 12402687845025 is 52054878620421.

The square root of 12402687845025 is 3521745.

It is a perfect power (a square), and thus also a powerful number.

12402687845025 is a `hidden beast` number, since 1 + 2 + 4 + 0 + 2 + 68 + 78 + 4 + 502 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 3229349167521 + 9173338677504 = 1797039^2 + 3028752^2 .

It is not a de Polignac number, because 12402687845025 - 2³ = 12402687845017 is a prime.

It is a super-2 number, since 2×12402687845025² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 188 ways as a sum of consecutive naturals, for example, 9033275239 + ... + 9033276611.

Almost surely, 2^{12402687845025} is an apocalyptic number.

12402687845025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12402687845025 is the 3521745-th square number.

12402687845025 is the 1760873-rd centered octagonal number.

It is an amenable number.

12402687845025 is a deficient number, since it is larger than the sum of its proper divisors (11950977372744).

12402687845025 is an frugal number, since it uses more digits than its factorization.

12402687845025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2812 (or 1400 counting only the distinct ones).

The product of its (nonzero) digits is 8601600, while the sum is 54.

The spelling of 12402687845025 in words is "twelve trillion, four hundred two billion, six hundred eighty-seven million, eight hundred forty-five thousand, twenty-five".