1651051664 has 80 divisors (see below), whose sum is σ = 3511382400. Its totient is φ = 749048832.

The previous prime is 1651051663. The next prime is 1651051691. The reversal of 1651051664 is 4661501561.

It is not an unprimeable number, because it can be changed into a prime (1651051663) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1207109 + ... + 1208475.

It is an arithmetic number, because the mean of its divisors is an integer number (43892280).

Almost surely, 2^1651051664 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 1651051664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1755691200).

1651051664 is an abundant number, since it is smaller than the sum of its proper divisors (1860330736).

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

1651051664 is a wasteful number, since it uses less digits than its factorization.

1651051664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1560 (or 1554 counting only the distinct ones).

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

The square root of 1651051664 is about 40633.1350501041. The cubic root of 1651051664 is about 1181.9167507502.

The spelling of 1651051664 in words is "one billion, six hundred fifty-one million, fifty-one thousand, six hundred sixty-four".