1720264821264 has 120 divisors (see below), whose sum is σ = 5273814415584. Its totient is φ = 519129216000.

The previous prime is 1720264821239. The next prime is 1720264821283. The reversal of 1720264821264 is 4621284620271.

1720264821264 is a `hidden beast` number, since 1 + 7 + 20 + 26 + 482 + 126 + 4 = 666.

It is a super-2 number, since 2×1720264821264² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1871422 + ... + 2634909.

Almost surely, 2^{1720264821264} is an apocalyptic number.

It is an amenable number.

1720264821264 is an abundant number, since it is smaller than the sum of its proper divisors (3553549594320).

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

1720264821264 is a wasteful number, since it uses less digits than its factorization.

1720264821264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4506597 (or 4506588 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 45.

The spelling of 1720264821264 in words is "one trillion, seven hundred twenty billion, two hundred sixty-four million, eight hundred twenty-one thousand, two hundred sixty-four".