1693481664 has 56 divisors (see below), whose sum is σ = 5120770048. Its totient is φ = 483851520.

The previous prime is 1693481663. The next prime is 1693481677. The reversal of 1693481664 is 4661843961.

It is a tau number, because it is divible by the number of its divisors (56).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (1693481663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 628672 + ... + 631359.

Almost surely, 2^1693481664 is an apocalyptic number.

1693481664 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1693481664 is an abundant number, since it is smaller than the sum of its proper divisors (3427288384).

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

1693481664 is a wasteful number, since it uses less digits than its factorization.

1693481664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1260053 (or 1260043 counting only the distinct ones).

The product of its digits is 746496, while the sum is 48.

The square root of 1693481664 is about 41151.9339035239. The cubic root of 1693481664 is about 1191.9558411940.

The spelling of 1693481664 in words is "one billion, six hundred ninety-three million, four hundred eighty-one thousand, six hundred sixty-four".