403064006640 has 80 divisors (see below), whose sum is σ = 1267097043456. Its totient is φ = 105969875200.

The previous prime is 403064006623. The next prime is 403064006641. The reversal of 403064006640 is 46600460304.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-3 number, since 3×403064006640³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (403064006641) 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 15 ways as a sum of consecutive naturals, for example, 11809956 + ... + 11844035.

Almost surely, 2^403064006640 is an apocalyptic number.

403064006640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

403064006640 is an abundant number, since it is smaller than the sum of its proper divisors (864033036816).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

403064006640 is a wasteful number, since it uses less digits than its factorization.

403064006640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23654078 (or 23654072 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 33.

Adding to 403064006640 its reverse (46600460304), we get a palindrome (449664466944).

The spelling of 403064006640 in words is "four hundred three billion, sixty-four million, six thousand, six hundred forty".