1664401605630 has 16 divisors (see below), whose sum is σ = 3994563853584. Its totient is φ = 443840428160.

The previous prime is 1664401605611. The next prime is 1664401605653. The reversal of 1664401605630 is 365061044661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27740026731 + ... + 27740026790.

It is an arithmetic number, because the mean of its divisors is an integer number (249660240849).

Almost surely, 2^{1664401605630} is an apocalyptic number.

1664401605630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1664401605630 is an abundant number, since it is smaller than the sum of its proper divisors (2330162247954).

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

1664401605630 is a wasteful number, since it uses less digits than its factorization.

1664401605630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55480053531.

The product of its (nonzero) digits is 311040, while the sum is 42.

The spelling of 1664401605630 in words is "one trillion, six hundred sixty-four billion, four hundred one million, six hundred five thousand, six hundred thirty".