1610641616 has 20 divisors (see below), whose sum is σ = 3132768612. Its totient is φ = 802185216.

The previous prime is 1610641607. The next prime is 1610641657. The reversal of 1610641616 is 6161460161.

It can be written as a sum of positive squares in 2 ways, for example, as 859662400 + 750979216 = 29320^2 + 27404^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 191735 + ... + 199958.

Almost surely, 2^1610641616 is an apocalyptic number.

1610641616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1610641616 is a deficient number, since it is larger than the sum of its proper divisors (1522126996).

1610641616 is a wasteful number, since it uses less digits than its factorization.

1610641616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391958 (or 391952 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 1610641616 is about 40132.7997528206. The cubic root of 1610641616 is about 1172.1943905217.

The spelling of 1610641616 in words is "one billion, six hundred ten million, six hundred forty-one thousand, six hundred sixteen".