12504020546477 has 4 divisors (see below), whose sum is σ = 13239551166876. Its totient is φ = 11768489926080.

The previous prime is 12504020546471. The next prime is 12504020546527. The reversal of 12504020546477 is 77464502040521.

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 7906281099721 + 4597739446756 = 2811811^2 + 2144234^2 .

It is a cyclic number.

It is not a de Polignac number, because 12504020546477 - 2⁴ = 12504020546461 is a prime.

It is a super-2 number, since 2×12504020546477² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12504020546471) 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, 367765310174 + ... + 367765310207.

It is an arithmetic number, because the mean of its divisors is an integer number (3309887791719).

Almost surely, 2^{12504020546477} is an apocalyptic number.

12504020546477 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

12504020546477 is a deficient number, since it is larger than the sum of its proper divisors (735530620399).

12504020546477 is an equidigital number, since it uses as much as digits as its factorization.

12504020546477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 735530620398.

The product of its (nonzero) digits is 1881600, while the sum is 47.

Adding to 12504020546477 its reverse (77464502040521), we get a palindrome (89968522586998).

The spelling of 12504020546477 in words is "twelve trillion, five hundred four billion, twenty million, five hundred forty-six thousand, four hundred seventy-seven".