162211621651 has 4 divisors (see below), whose sum is σ = 162372387400. Its totient is φ = 162050855904.

The previous prime is 162211621643. The next prime is 162211621661. The reversal of 162211621651 is 156126112261.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 162211621651 - 2³ = 162211621643 is a prime.

It is a super-2 number, since 2×162211621651² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (162211621661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80381361 + ... + 80383378.

It is an arithmetic number, because the mean of its divisors is an integer number (40593096850).

Almost surely, 2^162211621651 is an apocalyptic number.

162211621651 is a deficient number, since it is larger than the sum of its proper divisors (160765749).

162211621651 is a wasteful number, since it uses less digits than its factorization.

162211621651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160765748.

The product of its digits is 8640, while the sum is 34.

The spelling of 162211621651 in words is "one hundred sixty-two billion, two hundred eleven million, six hundred twenty-one thousand, six hundred fifty-one".