1629861064650 has 576 divisors, whose sum is σ = 5641066948608. Its totient is φ = 327917652480.

The previous prime is 1629861064639. The next prime is 1629861064669. The reversal of 1629861064650 is 564601689261.

1629861064650 is a `hidden beast` number, since 1 + 629 + 8 + 6 + 1 + 0 + 6 + 4 + 6 + 5 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 326819457 + ... + 326824443.

It is an arithmetic number, because the mean of its divisors is an integer number (9793519008).

Almost surely, 2^{1629861064650} is an apocalyptic number.

1629861064650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1629861064650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2820533474304).

1629861064650 is an abundant number, since it is smaller than the sum of its proper divisors (4011205883958).

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

1629861064650 is a wasteful number, since it uses less digits than its factorization.

1629861064650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5395 (or 5387 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 54.

The spelling of 1629861064650 in words is "one trillion, six hundred twenty-nine billion, eight hundred sixty-one million, sixty-four thousand, six hundred fifty".