1947041664 has 32 divisors (see below), whose sum is σ = 5171830440. Its totient is φ = 649013760.

The previous prime is 1947041653. The next prime is 1947041669. The reversal of 1947041664 is 4661407491.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1947041669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2534827 + ... + 2535594.

Almost surely, 2^1947041664 is an apocalyptic number.

It is an amenable number.

1947041664 is an abundant number, since it is smaller than the sum of its proper divisors (3224788776).

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

1947041664 is an equidigital number, since it uses as much as digits as its factorization.

1947041664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5070438 (or 5070426 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 1947041664 is about 44125.2950585036. The cubic root of 1947041664 is about 1248.7008719341.

The spelling of 1947041664 in words is "one billion, nine hundred forty-seven million, forty-one thousand, six hundred sixty-four".