1641505616 has 10 divisors (see below), whose sum is σ = 3180417162. Its totient is φ = 820752800.

The previous prime is 1641505609. The next prime is 1641505633. The reversal of 1641505616 is 6165051461.

It can be written as a sum of positive squares in only one way, i.e., 1175118400 + 466387216 = 34280^2 + 21596^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51297035 + ... + 51297066.

Almost surely, 2^1641505616 is an apocalyptic number.

1641505616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1641505616 is a deficient number, since it is larger than the sum of its proper divisors (1538911546).

1641505616 is a wasteful number, since it uses less digits than its factorization.

1641505616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102594109 (or 102594103 counting only the distinct ones).

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

The square root of 1641505616 is about 40515.4984666362. The cubic root of 1641505616 is about 1179.6344783787.

The spelling of 1641505616 in words is "one billion, six hundred forty-one million, five hundred five thousand, six hundred sixteen".