1720672151317 has 32 divisors (see below), whose sum is σ = 2123351822592. Its totient is φ = 1360689767424.

The previous prime is 1720672151299. The next prime is 1720672151333. The reversal of 1720672151317 is 7131512760271.

It is a cyclic number.

It is not a de Polignac number, because 1720672151317 - 2³⁹ = 1170916337429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1720672151377) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6922798 + ... + 7167040.

It is an arithmetic number, because the mean of its divisors is an integer number (66354744456).

Almost surely, 2^{1720672151317} is an apocalyptic number.

1720672151317 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1720672151317 is a deficient number, since it is larger than the sum of its proper divisors (402679671275).

1720672151317 is a wasteful number, since it uses less digits than its factorization.

1720672151317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245437.

The product of its (nonzero) digits is 123480, while the sum is 43.

The spelling of 1720672151317 in words is "one trillion, seven hundred twenty billion, six hundred seventy-two million, one hundred fifty-one thousand, three hundred seventeen".