649112616 has 80 divisors (see below), whose sum is σ = 1845375840. Its totient is φ = 213127200.

The previous prime is 649112579. The next prime is 649112617. The reversal of 649112616 is 616211946.

649112616 is a `hidden beast` number, since 649 + 1 + 1 + 2 + 6 + 1 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (649112617) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 35941 + ... + 50891.

It is an arithmetic number, because the mean of its divisors is an integer number (23067198).

Almost surely, 2^649112616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 649112616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (922687920).

649112616 is an abundant number, since it is smaller than the sum of its proper divisors (1196263224).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

649112616 is a wasteful number, since it uses less digits than its factorization.

649112616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15036 (or 15023 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 649112616 is about 25477.6885921781. The cubic root of 649112616 is about 865.8447274983.

The spelling of 649112616 in words is "six hundred forty-nine million, one hundred twelve thousand, six hundred sixteen".