161663041537926 has 64 divisors (see below), whose sum is σ = 330428561227776. Its totient is φ = 52705491962400.

The previous prime is 161663041537913. The next prime is 161663041537927. The reversal of 161663041537926 is 629735140366161.

It is a super-2 number, since 2×161663041537926² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 161663041537926.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161663041537927) 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 31 ways as a sum of consecutive naturals, for example, 5340510171 + ... + 5340540441.

It is an arithmetic number, because the mean of its divisors is an integer number (5162946269184).

Almost surely, 2^{161663041537926} is an apocalyptic number.

161663041537926 is an abundant number, since it is smaller than the sum of its proper divisors (168765519689850).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161663041537926 is a wasteful number, since it uses less digits than its factorization.

161663041537926 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42497.

The product of its (nonzero) digits is 29393280, while the sum is 60.

The spelling of 161663041537926 in words is "one hundred sixty-one trillion, six hundred sixty-three billion, forty-one million, five hundred thirty-seven thousand, nine hundred twenty-six".