1720700557452 has 96 divisors (see below), whose sum is σ = 4547521440000. Its totient is φ = 562498814592.

The previous prime is 1720700557441. The next prime is 1720700557469. The reversal of 1720700557452 is 2547550070271.

1720700557452 is a `hidden beast` number, since 1 + 7 + 2 + 0 + 70 + 0 + 5 + 574 + 5 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1720700557398 and 1720700557407.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2347624 + ... + 2992112.

It is an arithmetic number, because the mean of its divisors is an integer number (47370015000).

Almost surely, 2^{1720700557452} is an apocalyptic number.

1720700557452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1720700557452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2273760720000).

1720700557452 is an abundant number, since it is smaller than the sum of its proper divisors (2826820882548).

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

1720700557452 is a wasteful number, since it uses less digits than its factorization.

1720700557452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644980 (or 644972 counting only the distinct ones).

The product of its (nonzero) digits is 686000, while the sum is 45.

The spelling of 1720700557452 in words is "one trillion, seven hundred twenty billion, seven hundred million, five hundred fifty-seven thousand, four hundred fifty-two".