616922491 has 16 divisors (see below), whose sum is σ = 658082880. Its totient is φ = 577033600.

The previous prime is 616922461. The next prime is 616922507. The reversal of 616922491 is 194229616.

It is a cyclic number.

It is not a de Polignac number, because 616922491 - 2⁷ = 616922363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (616922441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 473541 + ... + 474841.

It is an arithmetic number, because the mean of its divisors is an integer number (41130180).

Almost surely, 2^616922491 is an apocalyptic number.

616922491 is a deficient number, since it is larger than the sum of its proper divisors (41160389).

616922491 is a wasteful number, since it uses less digits than its factorization.

616922491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1766.

The product of its digits is 46656, while the sum is 40.

The square root of 616922491 is about 24837.9244503239. The cubic root of 616922491 is about 851.2886984836.

The spelling of 616922491 in words is "six hundred sixteen million, nine hundred twenty-two thousand, four hundred ninety-one".