161634253493498 has 16 divisors (see below), whose sum is σ = 255678545922720. Its totient is φ = 76423623743376.

The previous prime is 161634253493497. The next prime is 161634253493501. The reversal of 161634253493498 is 894394352436161.

It is a happy number.

It is a super-2 number, since 2×161634253493498² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161634253493497) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3888034961 + ... + 3888076532.

It is an arithmetic number, because the mean of its divisors is an integer number (15979909120170).

Almost surely, 2^{161634253493498} is an apocalyptic number.

161634253493498 is a deficient number, since it is larger than the sum of its proper divisors (94044292429222).

161634253493498 is a wasteful number, since it uses less digits than its factorization.

161634253493498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7776112061.

The product of its digits is 403107840, while the sum is 68.

The spelling of 161634253493498 in words is "one hundred sixty-one trillion, six hundred thirty-four billion, two hundred fifty-three million, four hundred ninety-three thousand, four hundred ninety-eight".