1651642564 has 96 divisors (see below), whose sum is σ = 3619445760. Its totient is φ = 648259200.

The previous prime is 1651642549. The next prime is 1651642589. The reversal of 1651642564 is 4652461561.

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 31 ways as a sum of consecutive naturals, for example, 901129 + ... + 902959.

It is an arithmetic number, because the mean of its divisors is an integer number (37702560).

Almost surely, 2^1651642564 is an apocalyptic number.

It is an amenable number.

1651642564 is an abundant number, since it is smaller than the sum of its proper divisors (1967803196).

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

1651642564 is a wasteful number, since it uses less digits than its factorization.

1651642564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1961 (or 1959 counting only the distinct ones).

The product of its digits is 172800, while the sum is 40.

The square root of 1651642564 is about 40640.4055590000. The cubic root of 1651642564 is about 1182.0577338829.

The spelling of 1651642564 in words is "one billion, six hundred fifty-one million, six hundred forty-two thousand, five hundred sixty-four".