616971691 has 24 divisors (see below), whose sum is σ = 733425840. Its totient is φ = 517370112.

The previous prime is 616971689. The next prime is 616971713. The reversal of 616971691 is 196179616.

It is not a de Polignac number, because 616971691 - 2¹ = 616971689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (616971631) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 489420 + ... + 490678.

It is an arithmetic number, because the mean of its divisors is an integer number (30559410).

Almost surely, 2^616971691 is an apocalyptic number.

616971691 is a deficient number, since it is larger than the sum of its proper divisors (116454149).

616971691 is a wasteful number, since it uses less digits than its factorization.

616971691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1483 (or 1476 counting only the distinct ones).

The product of its digits is 122472, while the sum is 46.

The square root of 616971691 is about 24838.9148514986. The cubic root of 616971691 is about 851.3113281716.

The spelling of 616971691 in words is "six hundred sixteen million, nine hundred seventy-one thousand, six hundred ninety-one".