1630745764 has 24 divisors (see below), whose sum is σ = 2937663288. Its totient is φ = 791731200.

The previous prime is 1630745761. The next prime is 1630745773. The reversal of 1630745764 is 4675470361.

It can be written as a sum of positive squares in 4 ways, for example, as 583705600 + 1047040164 = 24160^2 + 32358^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1630745764.

It is not an unprimeable number, because it can be changed into a prime (1630745761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19087 + ... + 60214.

It is an arithmetic number, because the mean of its divisors is an integer number (122402637).

Almost surely, 2^1630745764 is an apocalyptic number.

It is an amenable number.

1630745764 is a deficient number, since it is larger than the sum of its proper divisors (1306917524).

1630745764 is a wasteful number, since it uses less digits than its factorization.

1630745764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79455 (or 79453 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 43.

The square root of 1630745764 is about 40382.4932860763. The cubic root of 1630745764 is about 1177.0513768882.

The spelling of 1630745764 in words is "one billion, six hundred thirty million, seven hundred forty-five thousand, seven hundred sixty-four".