1720866362997 has 16 divisors (see below), whose sum is σ = 2350607212800. Its totient is φ = 1119188582400.

The previous prime is 1720866362987. The next prime is 1720866363109. The reversal of 1720866362997 is 7992636680271.

It is a de Polignac number, because none of the positive numbers 2^k-1720866362997 is a prime.

It is a super-2 number, since 2×1720866362997² (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 (1720866362947) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1434004 + ... + 2344802.

It is an arithmetic number, because the mean of its divisors is an integer number (146912950800).

Almost surely, 2^{1720866362997} is an apocalyptic number.

It is an amenable number.

1720866362997 is a deficient number, since it is larger than the sum of its proper divisors (629740849803).

1720866362997 is a wasteful number, since it uses less digits than its factorization.

1720866362997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 926204.

The product of its (nonzero) digits is 82301184, while the sum is 66.

The spelling of 1720866362997 in words is "one trillion, seven hundred twenty billion, eight hundred sixty-six million, three hundred sixty-two thousand, nine hundred ninety-seven".