1610641566 has 12 divisors (see below), whose sum is σ = 3489723432. Its totient is φ = 536880516.

The previous prime is 1610641541. The next prime is 1610641567. The reversal of 1610641566 is 6651460161.

It is a happy number.

1610641566 is a `hidden beast` number, since 1 + 6 + 1 + 0 + 641 + 5 + 6 + 6 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1610641566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1610641567) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 44740026 + ... + 44740061.

It is an arithmetic number, because the mean of its divisors is an integer number (290810286).

Almost surely, 2^1610641566 is an apocalyptic number.

1610641566 is an abundant number, since it is smaller than the sum of its proper divisors (1879081866).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1610641566 is a wasteful number, since it uses less digits than its factorization.

1610641566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89480095 (or 89480092 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 1610641566 is about 40132.7991298888. The cubic root of 1610641566 is about 1172.1943783920.

The spelling of 1610641566 in words is "one billion, six hundred ten million, six hundred forty-one thousand, five hundred sixty-six".