1673653356 has 72 divisors (see below), whose sum is σ = 4279009280. Its totient is φ = 551543904.

The previous prime is 1673653343. The next prime is 1673653357. The reversal of 1673653356 is 6533563761.

1673653356 is a `hidden beast` number, since 1 + 67 + 3 + 6 + 533 + 56 = 666.

It is a super-2 number, since 2×1673653356² = 5602231112100125472, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1673653357) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1307925 + ... + 1309203.

Almost surely, 2^1673653356 is an apocalyptic number.

It is an amenable number.

1673653356 is an abundant number, since it is smaller than the sum of its proper divisors (2605355924).

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

1673653356 is a wasteful number, since it uses less digits than its factorization.

1673653356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1675 (or 1670 counting only the distinct ones).

The product of its digits is 1020600, while the sum is 45.

The square root of 1673653356 is about 40910.3086764204. The cubic root of 1673653356 is about 1187.2855190994.

The spelling of 1673653356 in words is "one billion, six hundred seventy-three million, six hundred fifty-three thousand, three hundred fifty-six".