616497680 has 20 divisors (see below), whose sum is σ = 1433357292. Its totient is φ = 246599040.

The previous prime is 616497653. The next prime is 616497691. The reversal of 616497680 is 86794616.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 282777856 + 333719824 = 16816^2 + 18268^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3853031 + ... + 3853190.

Almost surely, 2^616497680 is an apocalyptic number.

It is an amenable number.

616497680 is an abundant number, since it is smaller than the sum of its proper divisors (816859612).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

616497680 is a wasteful number, since it uses less digits than its factorization.

616497680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7706234 (or 7706228 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 47.

The square root of 616497680 is about 24829.3713170511. The cubic root of 616497680 is about 851.0932553241.

The spelling of 616497680 in words is "six hundred sixteen million, four hundred ninety-seven thousand, six hundred eighty".