12553191481 has 4 divisors (see below), whose sum is σ = 12608492112. Its totient is φ = 12497890852.

The previous prime is 12553191473. The next prime is 12553191503. The reversal of 12553191481 is 18419135521.

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 12553191481 - 2³ = 12553191473 is a prime.

It is a super-2 number, since 2×12553191481² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12553191451) 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, 27649975 + ... + 27650428.

It is an arithmetic number, because the mean of its divisors is an integer number (3152123028).

Almost surely, 2^12553191481 is an apocalyptic number.

It is an amenable number.

12553191481 is a deficient number, since it is larger than the sum of its proper divisors (55300631).

12553191481 is an equidigital number, since it uses as much as digits as its factorization.

12553191481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55300630.

The product of its digits is 43200, while the sum is 40.

The spelling of 12553191481 in words is "twelve billion, five hundred fifty-three million, one hundred ninety-one thousand, four hundred eighty-one".