403663543601 has 4 divisors (see below), whose sum is σ = 410280978804. Its totient is φ = 397046108400.

The previous prime is 403663543589. The next prime is 403663543663. The reversal of 403663543601 is 106345366304.

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 13008543025 + 390655000576 = 114055^2 + 625024^2 .

It is a cyclic number.

It is not a de Polignac number, because 403663543601 - 2²² = 403659349297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (403663543001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3308717510 + ... + 3308717631.

It is an arithmetic number, because the mean of its divisors is an integer number (102570244701).

Almost surely, 2^403663543601 is an apocalyptic number.

It is an amenable number.

403663543601 is a deficient number, since it is larger than the sum of its proper divisors (6617435203).

403663543601 is an equidigital number, since it uses as much as digits as its factorization.

403663543601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6617435202.

The product of its (nonzero) digits is 466560, while the sum is 41.

The spelling of 403663543601 in words is "four hundred three billion, six hundred sixty-three million, five hundred forty-three thousand, six hundred one".