616561434 has 24 divisors (see below), whose sum is σ = 1366951872. Its totient is φ = 200740680.

The previous prime is 616561427. The next prime is 616561459. The reversal of 616561434 is 434165616.

It is a happy number.

616561434 is a `hidden beast` number, since 6 + 1 + 6 + 5 + 614 + 34 = 666.

It is a super-2 number, since 2×616561434² = 760296003792272712, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 397522 + ... + 399069.

It is an arithmetic number, because the mean of its divisors is an integer number (56956328).

Almost surely, 2^616561434 is an apocalyptic number.

616561434 is an abundant number, since it is smaller than the sum of its proper divisors (750390438).

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

616561434 is a wasteful number, since it uses less digits than its factorization.

616561434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 796642 (or 796639 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 616561434 is about 24830.6551262749. The cubic root of 616561434 is about 851.1225924062.

The spelling of 616561434 in words is "six hundred sixteen million, five hundred sixty-one thousand, four hundred thirty-four".