616291497 has 42 divisors (see below), whose sum is σ = 982775322. Its totient is φ = 384958656.

The previous prime is 616291493. The next prime is 616291513. The reversal of 616291497 is 794192616.

616291497 is a `hidden beast` number, since 6 + 1 + 629 + 14 + 9 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 580039056 + 36252441 = 24084^2 + 6021^2 .

It is not a de Polignac number, because 616291497 - 2² = 616291493 is a prime.

Its product of digits (163296) is a multiple of the sum of its prime divisors (243).

It is not an unprimeable number, because it can be changed into a prime (616291493) 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 41 ways as a sum of consecutive naturals, for example, 2763528 + ... + 2763750.

Almost surely, 2^616291497 is an apocalyptic number.

It is an amenable number.

616291497 is a deficient number, since it is larger than the sum of its proper divisors (366483825).

616291497 is an frugal number, since it uses more digits than its factorization.

616291497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481 (or 243 counting only the distinct ones).

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

The square root of 616291497 is about 24825.2189718439. The cubic root of 616291497 is about 850.9983641711.

The spelling of 616291497 in words is "six hundred sixteen million, two hundred ninety-one thousand, four hundred ninety-seven".