616537091 has 8 divisors (see below), whose sum is σ = 631298304. Its totient is φ = 601944840.

The previous prime is 616537081. The next prime is 616537109. The reversal of 616537091 is 190735616.

616537091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-616537091 is a prime.

It is a super-3 number, since 3×616537091³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (616537081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34841 + ... + 49466.

It is an arithmetic number, because the mean of its divisors is an integer number (78912288).

Almost surely, 2^616537091 is an apocalyptic number.

616537091 is a deficient number, since it is larger than the sum of its proper divisors (14761213).

616537091 is a wasteful number, since it uses less digits than its factorization.

616537091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84481.

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 616537091 is about 24830.1649410551. The cubic root of 616537091 is about 851.1113909541. Note that the first 3 decimals are identical.

The spelling of 616537091 in words is "six hundred sixteen million, five hundred thirty-seven thousand, ninety-one".