616896641 has 4 divisors (see below), whose sum is σ = 616948692. Its totient is φ = 616844592.

The previous prime is 616896611. The next prime is 616896653. The reversal of 616896641 is 146698616.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 79584241 + 537312400 = 8921^2 + 23180^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-616896641 is a prime.

It is a super-2 number, since 2×616896641² = 761122931354165762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (616896601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1355 + ... + 35151.

It is an arithmetic number, because the mean of its divisors is an integer number (154237173).

Almost surely, 2^616896641 is an apocalyptic number.

It is an amenable number.

616896641 is a deficient number, since it is larger than the sum of its proper divisors (52051).

616896641 is a wasteful number, since it uses less digits than its factorization.

616896641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52050.

The product of its digits is 373248, while the sum is 47.

The square root of 616896641 is about 24837.4040712793. The cubic root of 616896641 is about 851.2768082161.

The spelling of 616896641 in words is "six hundred sixteen million, eight hundred ninety-six thousand, six hundred forty-one".