165221146225454 has 64 divisors (see below), whose sum is σ = 280184371488000. Its totient is φ = 72381333024000.

The previous prime is 165221146225451. The next prime is 165221146225519. The reversal of 165221146225454 is 454522641122561.

It is a super-2 number, since 2×165221146225454² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165221146225451) 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, 3872319029 + ... + 3872361695.

It is an arithmetic number, because the mean of its divisors is an integer number (4377880804500).

Almost surely, 2^{165221146225454} is an apocalyptic number.

165221146225454 is a deficient number, since it is larger than the sum of its proper divisors (114963225262546).

165221146225454 is a wasteful number, since it uses less digits than its factorization.

165221146225454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53409.

The product of its digits is 4608000, while the sum is 50.

The spelling of 165221146225454 in words is "one hundred sixty-five trillion, two hundred twenty-one billion, one hundred forty-six million, two hundred twenty-five thousand, four hundred fifty-four".