403364645661 has 4 divisors (see below), whose sum is σ = 537819527552. Its totient is φ = 268909763772.

The previous prime is 403364645659. The next prime is 403364645669. The reversal of 403364645661 is 166546463304.

It is a happy number.

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 403364645661 - 2¹ = 403364645659 is a prime.

It is a super-2 number, since 2×403364645661² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 403364645661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (403364645669) 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, 67227440941 + ... + 67227440946.

It is an arithmetic number, because the mean of its divisors is an integer number (134454881888).

Almost surely, 2^403364645661 is an apocalyptic number.

It is an amenable number.

403364645661 is a deficient number, since it is larger than the sum of its proper divisors (134454881891).

403364645661 is a wasteful number, since it uses less digits than its factorization.

403364645661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134454881890.

The product of its (nonzero) digits is 3732480, while the sum is 48.

The spelling of 403364645661 in words is "four hundred three billion, three hundred sixty-four million, six hundred forty-five thousand, six hundred sixty-one".