1610864663 has 4 divisors (see below), whose sum is σ = 1614314520. Its totient is φ = 1607414808.

The previous prime is 1610864641. The next prime is 1610864683. The reversal of 1610864663 is 3664680161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3664680161 = 41443 ⋅88427.

It is a cyclic number.

It is not a de Polignac number, because 1610864663 - 2⁶ = 1610864599 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1610864663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1610864623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1724228 + ... + 1725161.

It is an arithmetic number, because the mean of its divisors is an integer number (403578630).

Almost surely, 2^1610864663 is an apocalyptic number.

1610864663 is a deficient number, since it is larger than the sum of its proper divisors (3449857).

1610864663 is an equidigital number, since it uses as much as digits as its factorization.

1610864663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3449856.

The product of its (nonzero) digits is 124416, while the sum is 41.

The square root of 1610864663 is about 40135.5785183171. The cubic root of 1610864663 is about 1172.2484978149.

The spelling of 1610864663 in words is "one billion, six hundred ten million, eight hundred sixty-four thousand, six hundred sixty-three".