161665546130 has 64 divisors (see below), whose sum is σ = 319302466560. Its totient is φ = 58445318400.

The previous prime is 161665546129. The next prime is 161665546139. The reversal of 161665546130 is 31645566161.

It is a super-2 number, since 2×161665546130² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161665546139) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48127391 + ... + 48130749.

It is an arithmetic number, because the mean of its divisors is an integer number (4989101040).

Almost surely, 2^161665546130 is an apocalyptic number.

161665546130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161665546130 is a deficient number, since it is larger than the sum of its proper divisors (157636920430).

161665546130 is a wasteful number, since it uses less digits than its factorization.

161665546130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5795.

The product of its (nonzero) digits is 388800, while the sum is 44.

The spelling of 161665546130 in words is "one hundred sixty-one billion, six hundred sixty-five million, five hundred forty-six thousand, one hundred thirty".