1610661566650 has 24 divisors (see below), whose sum is σ = 2999208083040. Its totient is φ = 643538267760.

The previous prime is 1610661566611. The next prime is 1610661566677. The reversal of 1610661566650 is 566651660161.

It is a junction number, because it is equal to n+sod(n) for n = 1610661566594 and 1610661566603.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18114180 + ... + 18202879.

It is an arithmetic number, because the mean of its divisors is an integer number (124967003460).

Almost surely, 2^{1610661566650} is an apocalyptic number.

1610661566650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1610661566650 is a deficient number, since it is larger than the sum of its proper divisors (1388546516390).

1610661566650 is a wasteful number, since it uses less digits than its factorization.

1610661566650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36317958 (or 36317953 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 49.

The spelling of 1610661566650 in words is "one trillion, six hundred ten billion, six hundred sixty-one million, five hundred sixty-six thousand, six hundred fifty".