1629344646 has 36 divisors (see below), whose sum is σ = 3662997156. Its totient is φ = 542818260.

The previous prime is 1629344611. The next prime is 1629344657. The reversal of 1629344646 is 6464439261.

1629344646 is a `hidden beast` number, since 162 + 9 + 3 + 446 + 46 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 888951 + ... + 890781.

It is an arithmetic number, because the mean of its divisors is an integer number (101749921).

Almost surely, 2^1629344646 is an apocalyptic number.

1629344646 is an abundant number, since it is smaller than the sum of its proper divisors (2033652510).

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

1629344646 is an frugal number, since it uses more digits than its factorization.

1629344646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3679 (or 1836 counting only the distinct ones).

The product of its digits is 746496, while the sum is 45.

The square root of 1629344646 is about 40365.1414713240. The cubic root of 1629344646 is about 1176.7141772964.

The spelling of 1629344646 in words is "one billion, six hundred twenty-nine million, three hundred forty-four thousand, six hundred forty-six".