165495189722 has 16 divisors (see below), whose sum is σ = 255407985000. Its totient is φ = 80376821760.

The previous prime is 165495189677. The next prime is 165495189781. The reversal of 165495189722 is 227981594561.

It is a Cunningham number, because it is equal to 406811²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 165178029241 + 317160481 = 406421^2 + 17809^2 .

It is a super-2 number, since 2×165495189722² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4387847 + ... + 4425402.

Almost surely, 2^165495189722 is an apocalyptic number.

165495189722 is a deficient number, since it is larger than the sum of its proper divisors (89912795278).

165495189722 is a wasteful number, since it uses less digits than its factorization.

165495189722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8813521.

The product of its digits is 10886400, while the sum is 59.

The spelling of 165495189722 in words is "one hundred sixty-five billion, four hundred ninety-five million, one hundred eighty-nine thousand, seven hundred twenty-two".