1641664264280 has 32 divisors (see below), whose sum is σ = 3793575533040. Its totient is φ = 638917983360.

The previous prime is 1641664264241. The next prime is 1641664264283. The reversal of 1641664264280 is 824624661461.

It is a super-2 number, since 2×1641664264280² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1641664264283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 554614826 + ... + 554617785.

Almost surely, 2^{1641664264280} is an apocalyptic number.

1641664264280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1641664264280 is an abundant number, since it is smaller than the sum of its proper divisors (2151911268760).

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

1641664264280 is a wasteful number, since it uses less digits than its factorization.

1641664264280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1109232659 (or 1109232655 counting only the distinct ones).

The product of its (nonzero) digits is 2654208, while the sum is 50.

The spelling of 1641664264280 in words is "one trillion, six hundred forty-one billion, six hundred sixty-four million, two hundred sixty-four thousand, two hundred eighty".