161385448126 has 48 divisors (see below), whose sum is σ = 298136270160. Its totient is φ = 65146032000.

The previous prime is 161385448123. The next prime is 161385448127. The reversal of 161385448126 is 621844583161.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a self number, because there is not a number n which added to its sum of digits gives 161385448126.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161385448123) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 71626 + ... + 572626.

It is an arithmetic number, because the mean of its divisors is an integer number (6211172295).

Almost surely, 2^161385448126 is an apocalyptic number.

161385448126 is a deficient number, since it is larger than the sum of its proper divisors (136750822034).

161385448126 is a wasteful number, since it uses less digits than its factorization.

161385448126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501209 (or 501202 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 49.

The spelling of 161385448126 in words is "one hundred sixty-one billion, three hundred eighty-five million, four hundred forty-eight thousand, one hundred twenty-six".