161205280112750 has 32 divisors (see below), whose sum is σ = 301782600243072. Its totient is φ = 64480762500000.

The previous prime is 161205280112659. The next prime is 161205280112777. The reversal of 161205280112750 is 57211082502161.

It is a junction number, because it is equal to n+sod(n) for n = 161205280112698 and 161205280112707.

It is a congruent number.

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, 5264000 + ... + 18711500.

It is an arithmetic number, because the mean of its divisors is an integer number (9430706257596).

Almost surely, 2^{161205280112750} is an apocalyptic number.

161205280112750 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161205280112750 is a deficient number, since it is larger than the sum of its proper divisors (140577320130322).

161205280112750 is a wasteful number, since it uses less digits than its factorization.

161205280112750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13495469 (or 13495459 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 41.

The spelling of 161205280112750 in words is "one hundred sixty-one trillion, two hundred five billion, two hundred eighty million, one hundred twelve thousand, seven hundred fifty".