616688479 has 12 divisors (see below), whose sum is σ = 679417200. Its totient is φ = 559328000.

The previous prime is 616688477. The next prime is 616688521. The reversal of 616688479 is 974886616.

It is a happy number.

It is not a de Polignac number, because 616688479 - 2¹ = 616688477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616688477) 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 11 ways as a sum of consecutive naturals, for example, 48654 + ... + 60004.

It is an arithmetic number, because the mean of its divisors is an integer number (56618100).

Almost surely, 2^616688479 is an apocalyptic number.

616688479 is a deficient number, since it is larger than the sum of its proper divisors (62728721).

616688479 is a wasteful number, since it uses less digits than its factorization.

616688479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11822 (or 11811 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 55.

The square root of 616688479 is about 24833.2132234232. The cubic root of 616688479 is about 851.1810474861.

The spelling of 616688479 in words is "six hundred sixteen million, six hundred eighty-eight thousand, four hundred seventy-nine".