1633012945 has 64 divisors (see below), whose sum is σ = 2215273536. Its totient is φ = 1150156800.

The previous prime is 1633012943. The next prime is 1633012963. The reversal of 1633012945 is 5492103361.

It can be written as a sum of positive squares in 32 ways, for example, as 16008001 + 1617004944 = 4001^2 + 40212^2 .

It is not a de Polignac number, because 1633012945 - 2¹ = 1633012943 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1633012945.

It is not an unprimeable number, because it can be changed into a prime (1633012943) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 16168395 + ... + 16168495.

It is an arithmetic number, because the mean of its divisors is an integer number (34613649).

Almost surely, 2^1633012945 is an apocalyptic number.

It is an amenable number.

1633012945 is a deficient number, since it is larger than the sum of its proper divisors (582260591).

1633012945 is a wasteful number, since it uses less digits than its factorization.

1633012945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 1633012945 is about 40410.5548712215. The cubic root of 1633012945 is about 1177.5965983532.

The spelling of 1633012945 in words is "one billion, six hundred thirty-three million, twelve thousand, nine hundred forty-five".