12477810621 has 4 divisors (see below), whose sum is σ = 16637080832. Its totient is φ = 8318540412.

The previous prime is 12477810619. The next prime is 12477810641. The reversal of 12477810621 is 12601877421.

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 not a de Polignac number, because 12477810621 - 2¹ = 12477810619 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12477810621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12477810641) 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, 2079635101 + ... + 2079635106.

It is an arithmetic number, because the mean of its divisors is an integer number (4159270208).

Almost surely, 2^12477810621 is an apocalyptic number.

It is an amenable number.

12477810621 is a deficient number, since it is larger than the sum of its proper divisors (4159270211).

12477810621 is an equidigital number, since it uses as much as digits as its factorization.

12477810621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4159270210.

The product of its (nonzero) digits is 37632, while the sum is 39.

The spelling of 12477810621 in words is "twelve billion, four hundred seventy-seven million, eight hundred ten thousand, six hundred twenty-one".