616506641 has 8 divisors (see below), whose sum is σ = 641409024. Its totient is φ = 591917760.

The previous prime is 616506629. The next prime is 616506659. The reversal of 616506641 is 146605616.

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

It is a cyclic number.

It is not a de Polignac number, because 616506641 - 2¹⁴ = 616490257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (616506601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74360 + ... + 82233.

It is an arithmetic number, because the mean of its divisors is an integer number (80176128).

Almost surely, 2^616506641 is an apocalyptic number.

It is an amenable number.

616506641 is a deficient number, since it is larger than the sum of its proper divisors (24902383).

616506641 is a wasteful number, since it uses less digits than its factorization.

616506641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156751.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 616506641 is about 24829.5517680042. The cubic root of 616506641 is about 851.0973789458.

The spelling of 616506641 in words is "six hundred sixteen million, five hundred six thousand, six hundred forty-one".