1722981765376 has 27 divisors (see below), whose sum is σ = 3439275055671. Its totient is φ = 861480381696.

The previous prime is 1722981765301. The next prime is 1722981765437. The reversal of 1722981765376 is 6735671892271.

The square root of 1722981765376 is 1312624.

It is a perfect power (a square), and thus also a powerful number.

It is a Harshad number since it is a multiple of its sum of digits (64).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 20960965 + ... + 21043003.

Almost surely, 2^{1722981765376} is an apocalyptic number.

1722981765376 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

1722981765376 is the 1312624-th square number.

It is an amenable number.

1722981765376 is a deficient number, since it is larger than the sum of its proper divisors (1716293290295).

1722981765376 is an frugal number, since it uses more digits than its factorization.

1722981765376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164094 (or 82041 counting only the distinct ones).

The product of its digits is 53343360, while the sum is 64.

Multiplying 1722981765376 by its sum of digits (64), we get a square (110270832984064 = 10500992²).

1722981765376 divided by its sum of digits (64) gives a square (26921590084 = 164078²).

The spelling of 1722981765376 in words is "one trillion, seven hundred twenty-two billion, nine hundred eighty-one million, seven hundred sixty-five thousand, three hundred seventy-six".