161111503563522 has 32 divisors (see below), whose sum is σ = 324209252652480. Its totient is φ = 53373138262080.

The previous prime is 161111503563457. The next prime is 161111503563553. The reversal of 161111503563522 is 225365305111161.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41211933 + ... + 44951600.

It is an arithmetic number, because the mean of its divisors is an integer number (10131539145390).

Almost surely, 2^{161111503563522} is an apocalyptic number.

161111503563522 is an abundant number, since it is smaller than the sum of its proper divisors (163097749088958).

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

161111503563522 is a wasteful number, since it uses less digits than its factorization.

161111503563522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86165458.

The product of its (nonzero) digits is 162000, while the sum is 42.

Adding to 161111503563522 its reverse (225365305111161), we get a palindrome (386476808674683).

The spelling of 161111503563522 in words is "one hundred sixty-one trillion, one hundred eleven billion, five hundred three million, five hundred sixty-three thousand, five hundred twenty-two".