1613505516 has 72 divisors (see below), whose sum is σ = 4413157056. Its totient is φ = 457460640.

The previous prime is 1613505503. The next prime is 1613505529. The reversal of 1613505516 is 6155053161.

It is an interprime number because it is at equal distance from previous prime (1613505503) and next prime (1613505529).

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 66555 + ... + 87501.

It is an arithmetic number, because the mean of its divisors is an integer number (61293848).

Almost surely, 2^1613505516 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1613505516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2206578528).

1613505516 is an abundant number, since it is smaller than the sum of its proper divisors (2799651540).

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

1613505516 is a wasteful number, since it uses less digits than its factorization.

1613505516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21099 (or 21090 counting only the distinct ones).

The product of its (nonzero) digits is 13500, while the sum is 33.

The square root of 1613505516 is about 40168.4641976763. The cubic root of 1613505516 is about 1172.8887431553. Note that the first 3 decimals are identical.

Adding to 1613505516 its reverse (6155053161), we get a palindrome (7768558677).

The spelling of 1613505516 in words is "one billion, six hundred thirteen million, five hundred five thousand, five hundred sixteen".