1720840540368 has 40 divisors (see below), whose sum is σ = 4445580172000. Its totient is φ = 573603778944.

The previous prime is 1720840540357. The next prime is 1720840540387. The reversal of 1720840540368 is 8630450480271.

It is a super-2 number, since 2×1720840540368² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 2902083 + ... + 3444381.

It is an arithmetic number, because the mean of its divisors is an integer number (111139504300).

Almost surely, 2^{1720840540368} is an apocalyptic number.

It is an amenable number.

1720840540368 is an abundant number, since it is smaller than the sum of its proper divisors (2724739631632).

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

1720840540368 is a wasteful number, since it uses less digits than its factorization.

1720840540368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608419 (or 608413 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 48.

The spelling of 1720840540368 in words is "one trillion, seven hundred twenty billion, eight hundred forty million, five hundred forty thousand, three hundred sixty-eight".