165541621406930 has 32 divisors (see below), whose sum is σ = 299421427219200. Its totient is φ = 65895977696832.

The previous prime is 165541621406929. The next prime is 165541621406939. The reversal of 165541621406930 is 39604126145561.

165541621406930 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (165541621406939) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46761182 + ... + 50176601.

It is an arithmetic number, because the mean of its divisors is an integer number (9356919600600).

Almost surely, 2^{165541621406930} is an apocalyptic number.

165541621406930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165541621406930 is a deficient number, since it is larger than the sum of its proper divisors (133879805812270).

165541621406930 is a wasteful number, since it uses less digits than its factorization.

165541621406930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96938618.

The product of its (nonzero) digits is 4665600, while the sum is 53.

The spelling of 165541621406930 in words is "one hundred sixty-five trillion, five hundred forty-one billion, six hundred twenty-one million, four hundred six thousand, nine hundred thirty".