12529947773981 has 4 divisors (see below), whose sum is σ = 13669033935264. Its totient is φ = 11390861612700.

The previous prime is 12529947773947. The next prime is 12529947773989. The reversal of 12529947773981 is 18937774992521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12529947773981 - 2¹⁰ = 12529947772957 is a prime.

It is a super-2 number, since 2×12529947773981² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12529947773899 and 12529947773908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12529947773989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 569543080625 + ... + 569543080646.

It is an arithmetic number, because the mean of its divisors is an integer number (3417258483816).

Almost surely, 2^{12529947773981} is an apocalyptic number.

12529947773981 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12529947773981 is a deficient number, since it is larger than the sum of its proper divisors (1139086161283).

12529947773981 is a wasteful number, since it uses less digits than its factorization.

12529947773981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1139086161282.

The product of its digits is 480090240, while the sum is 74.

The spelling of 12529947773981 in words is "twelve trillion, five hundred twenty-nine billion, nine hundred forty-seven million, seven hundred seventy-three thousand, nine hundred eighty-one".