165651365324050 has 12 divisors (see below), whose sum is σ = 308111539502826. Its totient is φ = 66260546129600.

The previous prime is 165651365324023. The next prime is 165651365324069. The reversal of 165651365324050 is 50423563156561.

It can be written as a sum of positive squares in 3 ways, for example, as 155700059748289 + 9951305575761 = 12477983^2 + 3154569^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1656513653191 + ... + 1656513653290.

Almost surely, 2^{165651365324050} is an apocalyptic number.

165651365324050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165651365324050 is a deficient number, since it is larger than the sum of its proper divisors (142460174178776).

165651365324050 is a wasteful number, since it uses less digits than its factorization.

165651365324050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3313027306493 (or 3313027306488 counting only the distinct ones).

The product of its (nonzero) digits is 9720000, while the sum is 52.

The spelling of 165651365324050 in words is "one hundred sixty-five trillion, six hundred fifty-one billion, three hundred sixty-five million, three hundred twenty-four thousand, fifty".