12550257621 has 12 divisors (see below), whose sum is σ = 19776163680. Its totient is φ = 7606216680.

The previous prime is 12550257611. The next prime is 12550257631. The reversal of 12550257621 is 12675205521.

12550257621 is a `hidden beast` number, since 1 + 2 + 5 + 5 + 0 + 25 + 7 + 621 = 666.

It is an interprime number because it is at equal distance from previous prime (12550257611) and next prime (12550257631).

It is not a de Polignac number, because 12550257621 - 2⁶ = 12550257557 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12550257611) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63385041 + ... + 63385238.

It is an arithmetic number, because the mean of its divisors is an integer number (1648013640).

Almost surely, 2^12550257621 is an apocalyptic number.

12550257621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12550257621 is a deficient number, since it is larger than the sum of its proper divisors (7225906059).

12550257621 is a wasteful number, since it uses less digits than its factorization.

12550257621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126770296 (or 126770293 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 36.

The spelling of 12550257621 in words is "twelve billion, five hundred fifty million, two hundred fifty-seven thousand, six hundred twenty-one".