1633776972 has 12 divisors (see below), whose sum is σ = 3812146296. Its totient is φ = 544592320.

The previous prime is 1633776967. The next prime is 1633776983. The reversal of 1633776972 is 2796773361.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68074029 + ... + 68074052.

It is an arithmetic number, because the mean of its divisors is an integer number (317678858).

Almost surely, 2^1633776972 is an apocalyptic number.

1633776972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1633776972 is an abundant number, since it is smaller than the sum of its proper divisors (2178369324).

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

1633776972 is a wasteful number, since it uses less digits than its factorization.

1633776972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136148088 (or 136148086 counting only the distinct ones).

The product of its digits is 2000376, while the sum is 51.

The square root of 1633776972 is about 40420.0070757045. The cubic root of 1633776972 is about 1177.7802211716.

The spelling of 1633776972 in words is "one billion, six hundred thirty-three million, seven hundred seventy-six thousand, nine hundred seventy-two".