1622166212545 has 16 divisors (see below), whose sum is σ = 1999920803328. Its totient is φ = 1262516080960.

The previous prime is 1622166212543. The next prime is 1622166212561. The reversal of 1622166212545 is 5452126612261.

It is a happy number.

It is not a de Polignac number, because 1622166212545 - 2¹ = 1622166212543 is a prime.

It is a super-2 number, since 2×1622166212545² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1622166212543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20627926 + ... + 20706415.

It is an arithmetic number, because the mean of its divisors is an integer number (124995050208).

Almost surely, 2^{1622166212545} is an apocalyptic number.

It is an amenable number.

1622166212545 is a deficient number, since it is larger than the sum of its proper divisors (377754590783).

1622166212545 is a wasteful number, since it uses less digits than its factorization.

1622166212545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41334560.

The product of its digits is 345600, while the sum is 43.

The spelling of 1622166212545 in words is "one trillion, six hundred twenty-two billion, one hundred sixty-six million, two hundred twelve thousand, five hundred forty-five".