12554360621 has 4 divisors (see below), whose sum is σ = 13695666144. Its totient is φ = 11413055100.

The previous prime is 12554360569. The next prime is 12554360627. The reversal of 12554360621 is 12606345521.

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 a de Polignac number, because none of the positive numbers 2^k-12554360621 is a prime.

It is a super-2 number, since 2×12554360621² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12554360627) 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, 570652745 + ... + 570652766.

It is an arithmetic number, because the mean of its divisors is an integer number (3423916536).

Almost surely, 2^12554360621 is an apocalyptic number.

12554360621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12554360621 is a deficient number, since it is larger than the sum of its proper divisors (1141305523).

12554360621 is a wasteful number, since it uses less digits than its factorization.

12554360621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1141305522.

The product of its (nonzero) digits is 43200, while the sum is 35.

The spelling of 12554360621 in words is "twelve billion, five hundred fifty-four million, three hundred sixty thousand, six hundred twenty-one".