1773664642 has 16 divisors (see below), whose sum is σ = 2777890752. Its totient is φ = 847748880.

The previous prime is 1773664637. The next prime is 1773664661. The reversal of 1773664642 is 2464663771.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a junction number, because it is equal to n+sod(n) for n = 1773664592 and 1773664601.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69013 + ... + 91159.

It is an arithmetic number, because the mean of its divisors is an integer number (173618172).

Almost surely, 2^1773664642 is an apocalyptic number.

1773664642 is a deficient number, since it is larger than the sum of its proper divisors (1004226110).

1773664642 is a wasteful number, since it uses less digits than its factorization.

1773664642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23913.

The product of its digits is 1016064, while the sum is 46.

The square root of 1773664642 is about 42114.8981003160. The cubic root of 1773664642 is about 1210.4787491500.

The spelling of 1773664642 in words is "one billion, seven hundred seventy-three million, six hundred sixty-four thousand, six hundred forty-two".