1720623225255 has 48 divisors (see below), whose sum is σ = 3048109862112. Its totient is φ = 828152089600.

The previous prime is 1720623225193. The next prime is 1720623225329. The reversal of 1720623225255 is 5525223260271.

It is a happy number.

It is not a de Polignac number, because 1720623225255 - 2¹² = 1720623221159 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3211206 + ... + 3708515.

It is an arithmetic number, because the mean of its divisors is an integer number (63502288794).

Almost surely, 2^{1720623225255} is an apocalyptic number.

1720623225255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1720623225255 is a deficient number, since it is larger than the sum of its proper divisors (1327486636857).

1720623225255 is a wasteful number, since it uses less digits than its factorization.

1720623225255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6919888 (or 6919877 counting only the distinct ones).

The product of its (nonzero) digits is 504000, while the sum is 42.

The spelling of 1720623225255 in words is "one trillion, seven hundred twenty billion, six hundred twenty-three million, two hundred twenty-five thousand, two hundred fifty-five".