616279491 has 6 divisors (see below), whose sum is σ = 890181500. Its totient is φ = 410852988.

The previous prime is 616279481. The next prime is 616279541. The reversal of 616279491 is 194972616.

616279491 is a `hidden beast` number, since 616 + 27 + 9 + 4 + 9 + 1 = 666.

It is not a de Polignac number, because 616279491 - 2⁹ = 616278979 is a prime.

It is a super-2 number, since 2×616279491² = 759600822054438162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (616279441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34237741 + ... + 34237758.

Almost surely, 2^616279491 is an apocalyptic number.

616279491 is a deficient number, since it is larger than the sum of its proper divisors (273902009).

616279491 is a wasteful number, since it uses less digits than its factorization.

616279491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68475505 (or 68475502 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 616279491 is about 24824.9771601103. The cubic root of 616279491 is about 850.9928380238.

The spelling of 616279491 in words is "six hundred sixteen million, two hundred seventy-nine thousand, four hundred ninety-one".