13402461361 has 3 divisors (see below), whose sum is σ = 13402577131. Its totient is φ = 13402345592.

The previous prime is 13402461277. The next prime is 13402461409. The reversal of 13402461361 is 16316420431.

It is a happy number.

The square root of 13402461361 is 115769.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 16316420431 = 23977 ⋅680503.

It can be written as a sum of positive squares in only one way, i.e., 13324315761 + 78145600 = 115431^2 + 8840^2 .

It is a de Polignac number, because none of the positive numbers 2^k-13402461361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13402461161) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 57885 + ... + 173653.

Almost surely, 2^13402461361 is an apocalyptic number.

13402461361 is the 115769-th square number.

13402461361 is the 57885-th centered octagonal number.

It is an amenable number.

13402461361 is a deficient number, since it is larger than the sum of its proper divisors (115770).

13402461361 is an frugal number, since it uses more digits than its factorization.

13402461361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231538 (or 115769 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

Adding to 13402461361 its reverse (16316420431), we get a palindrome (29718881792).

The spelling of 13402461361 in words is "thirteen billion, four hundred two million, four hundred sixty-one thousand, three hundred sixty-one".