12772553477 has 4 divisors (see below), whose sum is σ = 12791420556. Its totient is φ = 12753686400.

The previous prime is 12772553471. The next prime is 12772553527. The reversal of 12772553477 is 77435527721.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6683716516 + 6088836961 = 81754^2 + 78031^2 .

It is a cyclic number.

It is not a de Polignac number, because 12772553477 - 2¹² = 12772549381 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 (12772553471) 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, 9432524 + ... + 9433877.

It is an arithmetic number, because the mean of its divisors is an integer number (3197855139).

Almost surely, 2^12772553477 is an apocalyptic number.

It is an amenable number.

12772553477 is a deficient number, since it is larger than the sum of its proper divisors (18867079).

12772553477 is an equidigital number, since it uses as much as digits as its factorization.

12772553477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18867078.

The product of its digits is 2881200, while the sum is 50.

The spelling of 12772553477 in words is "twelve billion, seven hundred seventy-two million, five hundred fifty-three thousand, four hundred seventy-seven".