616537646 has 8 divisors (see below), whose sum is σ = 936513120. Its totient is φ = 304366608.

The previous prime is 616537639. The next prime is 616537661. The reversal of 616537646 is 646735616.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 616537597 and 616537606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1950911 + ... + 1951226.

It is an arithmetic number, because the mean of its divisors is an integer number (117064140).

Almost surely, 2^616537646 is an apocalyptic number.

616537646 is a deficient number, since it is larger than the sum of its proper divisors (319975474).

616537646 is a wasteful number, since it uses less digits than its factorization.

616537646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3902218.

The product of its digits is 544320, while the sum is 44.

The square root of 616537646 is about 24830.1761169751. The cubic root of 616537646 is about 851.1116463411. Note that the first 3 decimals are identical.

The spelling of 616537646 in words is "six hundred sixteen million, five hundred thirty-seven thousand, six hundred forty-six".