403634641601 has 4 divisors (see below), whose sum is σ = 403636032900. Its totient is φ = 403633250304.

The previous prime is 403634641591. The next prime is 403634641639. The reversal of 403634641601 is 106146436304.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 326892345025 + 76742296576 = 571745^2 + 277024^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-403634641601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (403634641001) 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, 77216 + ... + 901793.

It is an arithmetic number, because the mean of its divisors is an integer number (100909008225).

Almost surely, 2^403634641601 is an apocalyptic number.

It is an amenable number.

403634641601 is a deficient number, since it is larger than the sum of its proper divisors (1391299).

403634641601 is an equidigital number, since it uses as much as digits as its factorization.

403634641601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1391298.

The product of its (nonzero) digits is 124416, while the sum is 38.

The spelling of 403634641601 in words is "four hundred three billion, six hundred thirty-four million, six hundred forty-one thousand, six hundred one".