616561706 has 4 divisors (see below), whose sum is σ = 924842562. Its totient is φ = 308280852.

The previous prime is 616561703. The next prime is 616561733. The reversal of 616561706 is 607165616.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 610534681 + 6027025 = 24709^2 + 2455^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 616561706.

It is not an unprimeable number, because it can be changed into a prime (616561703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 154140425 + ... + 154140428.

Almost surely, 2^616561706 is an apocalyptic number.

616561706 is a deficient number, since it is larger than the sum of its proper divisors (308280856).

616561706 is a wasteful number, since it uses less digits than its factorization.

616561706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308280855.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 616561706 is about 24830.6606033750. The cubic root of 616561706 is about 851.1227175655.

The spelling of 616561706 in words is "six hundred sixteen million, five hundred sixty-one thousand, seven hundred six".