616055891 has 6 divisors (see below), whose sum is σ = 677152476. Its totient is φ = 560050700.

The previous prime is 616055879. The next prime is 616055893. The reversal of 616055891 is 198550616.

It is not a de Polignac number, because 616055891 - 2¹⁰ = 616054867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (616055893) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2545565 + ... + 2545806.

It is an arithmetic number, because the mean of its divisors is an integer number (112858746).

Almost surely, 2^616055891 is an apocalyptic number.

616055891 is a deficient number, since it is larger than the sum of its proper divisors (61096585).

616055891 is a wasteful number, since it uses less digits than its factorization.

616055891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5091393 (or 5091382 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 41.

The square root of 616055891 is about 24820.4732227248. The cubic root of 616055891 is about 850.8899058213.

The spelling of 616055891 in words is "six hundred sixteen million, fifty-five thousand, eight hundred ninety-one".