1720623225256 has 16 divisors (see below), whose sum is σ = 3474335358900. Its totient is φ = 794133796224.

The previous prime is 1720623225193. The next prime is 1720623225329. The reversal of 1720623225256 is 6525223260271.

It can be written as a sum of positive squares in 2 ways, for example, as 1573604660356 + 147018564900 = 1254434^2 + 383430^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8272226941 + ... + 8272227148.

Almost surely, 2^{1720623225256} is an apocalyptic number.

It is an amenable number.

1720623225256 is an abundant number, since it is smaller than the sum of its proper divisors (1753712133644).

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

1720623225256 is a wasteful number, since it uses less digits than its factorization.

1720623225256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16544454108 (or 16544454104 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 43.

The spelling of 1720623225256 in words is "one trillion, seven hundred twenty billion, six hundred twenty-three million, two hundred twenty-five thousand, two hundred fifty-six".