1631664602 has 12 divisors (see below), whose sum is σ = 2528998218. Its totient is φ = 789514200.

The previous prime is 1631664599. The next prime is 1631664623. The reversal of 1631664602 is 2064661361.

It can be written as a sum of positive squares in only one way, i.e., 1409326681 + 222337921 = 37541^2 + 14911^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 422549 + ... + 426392.

Almost surely, 2^1631664602 is an apocalyptic number.

1631664602 is a deficient number, since it is larger than the sum of its proper divisors (897333616).

1631664602 is an equidigital number, since it uses as much as digits as its factorization.

1631664602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 849005 (or 848974 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 1631664602 is about 40393.8683713259. The cubic root of 1631664602 is about 1177.2724038756.

The spelling of 1631664602 in words is "one billion, six hundred thirty-one million, six hundred sixty-four thousand, six hundred two".