12551520061 has 4 divisors (see below), whose sum is σ = 13212126400. Its totient is φ = 11890913724.

The previous prime is 12551520043. The next prime is 12551520067. The reversal of 12551520061 is 16002515521.

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 12551520061 - 2⁵ = 12551520029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12551520067) 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, 330303141 + ... + 330303178.

It is an arithmetic number, because the mean of its divisors is an integer number (3303031600).

Almost surely, 2^12551520061 is an apocalyptic number.

It is an amenable number.

12551520061 is a deficient number, since it is larger than the sum of its proper divisors (660606339).

12551520061 is an equidigital number, since it uses as much as digits as its factorization.

12551520061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660606338.

The product of its (nonzero) digits is 3000, while the sum is 28.

The spelling of 12551520061 in words is "twelve billion, five hundred fifty-one million, five hundred twenty thousand, sixty-one".