616746091 has 4 divisors (see below), whose sum is σ = 664188112. Its totient is φ = 569304072.

The previous prime is 616746073. The next prime is 616746113. The reversal of 616746091 is 190647616.

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

It is a cyclic number.

It is not a de Polignac number, because 616746091 - 2¹¹ = 616744043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (616746041) 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, 23720991 + ... + 23721016.

It is an arithmetic number, because the mean of its divisors is an integer number (166047028).

Almost surely, 2^616746091 is an apocalyptic number.

616746091 is a deficient number, since it is larger than the sum of its proper divisors (47442021).

616746091 is a wasteful number, since it uses less digits than its factorization.

616746091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47442020.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 616746091 is about 24834.3731750975. The cubic root of 616746091 is about 851.2075528812.

The spelling of 616746091 in words is "six hundred sixteen million, seven hundred forty-six thousand, ninety-one".