161133250550 has 24 divisors (see below), whose sum is σ = 300403264032. Its totient is φ = 64303748000.

The previous prime is 161133250547. The next prime is 161133250559. The reversal of 161133250550 is 55052331161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161133250559) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3717041 + ... + 3760140.

It is an arithmetic number, because the mean of its divisors is an integer number (12516802668).

Almost surely, 2^161133250550 is an apocalyptic number.

161133250550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161133250550 is a deficient number, since it is larger than the sum of its proper divisors (139270013482).

161133250550 is a wasteful number, since it uses less digits than its factorization.

161133250550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7477624 (or 7477619 counting only the distinct ones).

The product of its (nonzero) digits is 13500, while the sum is 32.

The spelling of 161133250550 in words is "one hundred sixty-one billion, one hundred thirty-three million, two hundred fifty thousand, five hundred fifty".