1651640516 has 12 divisors (see below), whose sum is σ = 2902994220. Its totient is φ = 822213600.

The previous prime is 1651640503. The next prime is 1651640527. The reversal of 1651640516 is 6150461561.

It can be written as a sum of positive squares in 2 ways, for example, as 610287616 + 1041352900 = 24704^2 + 32270^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 900635 + ... + 902466.

It is an arithmetic number, because the mean of its divisors is an integer number (241916185).

Almost surely, 2^1651640516 is an apocalyptic number.

It is an amenable number.

1651640516 is a deficient number, since it is larger than the sum of its proper divisors (1251353704).

1651640516 is a wasteful number, since it uses less digits than its factorization.

1651640516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1803334 (or 1803332 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 1651640516 is about 40640.3803623933. The cubic root of 1651640516 is about 1182.0572453076.

The spelling of 1651640516 in words is "one billion, six hundred fifty-one million, six hundred forty thousand, five hundred sixteen".