161254325526 has 64 divisors (see below), whose sum is σ = 378818273280. Its totient is φ = 44810457120.

The previous prime is 161254325521. The next prime is 161254325543. The reversal of 161254325526 is 625523452161.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161254325521) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 140380 + ... + 584991.

It is an arithmetic number, because the mean of its divisors is an integer number (5919035520).

Almost surely, 2^161254325526 is an apocalyptic number.

161254325526 is an abundant number, since it is smaller than the sum of its proper divisors (217563947754).

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

161254325526 is a wasteful number, since it uses less digits than its factorization.

161254325526 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725529.

The product of its digits is 432000, while the sum is 42.

Adding to 161254325526 its reverse (625523452161), we get a palindrome (786777777687).

The spelling of 161254325526 in words is "one hundred sixty-one billion, two hundred fifty-four million, three hundred twenty-five thousand, five hundred twenty-six".