1613716765 has 4 divisors (see below), whose sum is σ = 1936460124. Its totient is φ = 1290973408.

The previous prime is 1613716763. The next prime is 1613716787. The reversal of 1613716765 is 5676173161.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1271207716 + 342509049 = 35654^2 + 18507^2 .

It is a cyclic number.

It is not a de Polignac number, because 1613716765 - 2¹ = 1613716763 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 (1613716763) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161371672 + ... + 161371681.

It is an arithmetic number, because the mean of its divisors is an integer number (484115031).

Almost surely, 2^1613716765 is an apocalyptic number.

It is an amenable number.

1613716765 is a deficient number, since it is larger than the sum of its proper divisors (322743359).

1613716765 is an equidigital number, since it uses as much as digits as its factorization.

1613716765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322743358.

The product of its digits is 158760, while the sum is 43.

The square root of 1613716765 is about 40171.0936495386. The cubic root of 1613716765 is about 1172.9399279327.

The spelling of 1613716765 in words is "one billion, six hundred thirteen million, seven hundred sixteen thousand, seven hundred sixty-five".