1651380648 has 32 divisors (see below), whose sum is σ = 4167041760. Its totient is φ = 545314880.

The previous prime is 1651380623. The next prime is 1651380683. The reversal of 1651380648 is 8460831561.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 318963 + ... + 324098.

It is an arithmetic number, because the mean of its divisors is an integer number (130220055).

Almost surely, 2^1651380648 is an apocalyptic number.

It is an amenable number.

1651380648 is an abundant number, since it is smaller than the sum of its proper divisors (2515661112).

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

1651380648 is a wasteful number, since it uses less digits than its factorization.

1651380648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643177 (or 643173 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 42.

The square root of 1651380648 is about 40637.1830716648. The cubic root of 1651380648 is about 1181.9952473605.

The spelling of 1651380648 in words is "one billion, six hundred fifty-one million, three hundred eighty thousand, six hundred forty-eight".