1353245950681 has 9 divisors (see below), whose sum is σ = 1363214461791. Its totient is φ = 1343349834144.

The previous prime is 1353245950633. The next prime is 1353245950687. The reversal of 1353245950681 is 1860595423531.

The square root of 1353245950681 is 1163291.

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

It can be written as a sum of positive squares in only one way, i.e., 979191390681 + 374054560000 = 989541^2 + 611600^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1353245950681 is a prime.

It is a super-2 number, since 2×1353245950681² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1353245950687) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 161693265 + ... + 161701633.

Almost surely, 2^{1353245950681} is an apocalyptic number.

1353245950681 is the 1163291-st square number.

1353245950681 is the 581646-th centered octagonal number.

It is an amenable number.

1353245950681 is a deficient number, since it is larger than the sum of its proper divisors (9968511110).

1353245950681 is an frugal number, since it uses more digits than its factorization.

1353245950681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17016 (or 8508 counting only the distinct ones).

The product of its (nonzero) digits is 3888000, while the sum is 52.

The spelling of 1353245950681 in words is "one trillion, three hundred fifty-three billion, two hundred forty-five million, nine hundred fifty thousand, six hundred eighty-one".