13663404577 has 8 divisors (see below), whose sum is σ = 14616281736. Its totient is φ = 12727099392.

The previous prime is 13663404553. The next prime is 13663404589. The reversal of 13663404577 is 77540436631.

It can be written as a sum of positive squares in 4 ways, for example, as 869306256 + 12794098321 = 29484^2 + 113111^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13663404577 - 2¹⁹ = 13662880289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13663404527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4141288 + ... + 4144585.

It is an arithmetic number, because the mean of its divisors is an integer number (1827035217).

Almost surely, 2^13663404577 is an apocalyptic number.

13663404577 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

13663404577 is a deficient number, since it is larger than the sum of its proper divisors (952877159).

13663404577 is an equidigital number, since it uses as much as digits as its factorization.

13663404577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8285987.

The product of its (nonzero) digits is 1270080, while the sum is 46.

The spelling of 13663404577 in words is "thirteen billion, six hundred sixty-three million, four hundred four thousand, five hundred seventy-seven".