916518641 has 4 divisors (see below), whose sum is σ = 937833072. Its totient is φ = 895204212.

The previous prime is 916518613. The next prime is 916518653. The reversal of 916518641 is 146815619.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 146815619 = 257 ⋅571267.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-916518641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (916518611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10657151 + ... + 10657236.

It is an arithmetic number, because the mean of its divisors is an integer number (234458268).

Almost surely, 2^916518641 is an apocalyptic number.

It is an amenable number.

916518641 is a deficient number, since it is larger than the sum of its proper divisors (21314431).

916518641 is a wasteful number, since it uses less digits than its factorization.

916518641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21314430.

The product of its digits is 51840, while the sum is 41.

The square root of 916518641 is about 30274.0588788487. The cubic root of 916518641 is about 971.3604889909.

The spelling of 916518641 in words is "nine hundred sixteen million, five hundred eighteen thousand, six hundred forty-one".