616161615 has 8 divisors (see below), whose sum is σ = 985858608. Its totient is φ = 328619520.

The previous prime is 616161613. The next prime is 616161619. The reversal of 616161615 is 516161616.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 616161615 - 2¹ = 616161613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616161613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20538706 + ... + 20538735.

It is an arithmetic number, because the mean of its divisors is an integer number (123232326).

Almost surely, 2^616161615 is an apocalyptic number.

616161615 is a deficient number, since it is larger than the sum of its proper divisors (369696993).

616161615 is a wasteful number, since it uses less digits than its factorization.

616161615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41077449.

The product of its digits is 6480, while the sum is 33.

The square root of 616161615 is about 24822.6029054167. The cubic root of 616161615 is about 850.9385779954.

Subtracting from 616161615 its reverse (516161616), we obtain a palindrome (99999999).

It can be divided in two parts, 6161 and 61615, that added together give a palindrome (67776).

The spelling of 616161615 in words is "six hundred sixteen million, one hundred sixty-one thousand, six hundred fifteen".