1616604261 has 16 divisors (see below), whose sum is σ = 2187529344. Its totient is φ = 1061815104.

The previous prime is 1616604233. The next prime is 1616604263. The reversal of 1616604261 is 1624066161.

It is a happy number.

It is not a de Polignac number, because 1616604261 - 2⁹ = 1616603749 is a prime.

It is a super-2 number, since 2×1616604261² = 5226818673366712242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1616604263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47595 + ... + 74151.

It is an arithmetic number, because the mean of its divisors is an integer number (136720584).

Almost surely, 2^1616604261 is an apocalyptic number.

It is an amenable number.

1616604261 is a deficient number, since it is larger than the sum of its proper divisors (570925083).

1616604261 is a wasteful number, since it uses less digits than its factorization.

1616604261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26860.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 1616604261 is about 40207.0175591277. The cubic root of 1616604261 is about 1173.6391091320.

The spelling of 1616604261 in words is "one billion, six hundred sixteen million, six hundred four thousand, two hundred sixty-one".