1725201365640 has 128 divisors (see below), whose sum is σ = 5234525596800. Its totient is φ = 454829619200.

The previous prime is 1725201365611. The next prime is 1725201365647. The reversal of 1725201365640 is 465631025271.

It is a super-2 number, since 2×1725201365640² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1725201365592 and 1725201365601.

It is not an unprimeable number, because it can be changed into a prime (1725201365647) 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, 8173756 + ... + 8382164.

It is an arithmetic number, because the mean of its divisors is an integer number (40894731225).

Almost surely, 2^{1725201365640} is an apocalyptic number.

1725201365640 is a gapful number since it is divisible by the number (10) 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 1725201365640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2617262798400).

1725201365640 is an abundant number, since it is smaller than the sum of its proper divisors (3509324231160).

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

1725201365640 is a wasteful number, since it uses less digits than its factorization.

1725201365640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209207 (or 209203 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 42.

The spelling of 1725201365640 in words is "one trillion, seven hundred twenty-five billion, two hundred one million, three hundred sixty-five thousand, six hundred forty".