1613252461 has 4 divisors (see below), whose sum is σ = 1652600124. Its totient is φ = 1573904800.

The previous prime is 1613252447. The next prime is 1613252471. The reversal of 1613252461 is 1642523161.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1642523161 = 21613 ⋅75997.

It can be written as a sum of positive squares in 2 ways, for example, as 817674025 + 795578436 = 28595^2 + 28206^2 .

It is a cyclic number.

It is not a de Polignac number, because 1613252461 - 2⁹ = 1613251949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1613252471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19673770 + ... + 19673851.

It is an arithmetic number, because the mean of its divisors is an integer number (413150031).

Almost surely, 2^1613252461 is an apocalyptic number.

It is an amenable number.

1613252461 is a deficient number, since it is larger than the sum of its proper divisors (39347663).

1613252461 is an equidigital number, since it uses as much as digits as its factorization.

1613252461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39347662.

The product of its digits is 8640, while the sum is 31.

The square root of 1613252461 is about 40165.3141528857. The cubic root of 1613252461 is about 1172.8274230718.

The spelling of 1613252461 in words is "one billion, six hundred thirteen million, two hundred fifty-two thousand, four hundred sixty-one".