1631610663 has 8 divisors (see below), whose sum is σ = 2205282288. Its totient is φ = 1072839744.

The previous prime is 1631610653. The next prime is 1631610707. The reversal of 1631610663 is 3660161361.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1631610663 - 2¹⁶ = 1631545127 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1631610653) 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, 3724920 + ... + 3725357.

It is an arithmetic number, because the mean of its divisors is an integer number (275660286).

Almost surely, 2^1631610663 is an apocalyptic number.

1631610663 is a deficient number, since it is larger than the sum of its proper divisors (573671625).

1631610663 is an equidigital number, since it uses as much as digits as its factorization.

1631610663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7450353.

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 1631610663 is about 40393.2007025935. The cubic root of 1631610663 is about 1177.2594311124.

The spelling of 1631610663 in words is "one billion, six hundred thirty-one million, six hundred ten thousand, six hundred sixty-three".