161767987059 has 12 divisors (see below), whose sum is σ = 250905449544. Its totient is φ = 92438849664.

The previous prime is 161767987049. The next prime is 161767987093. The reversal of 161767987059 is 950789767161.

It is not a de Polignac number, because 161767987059 - 2⁷ = 161767986931 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161767987049) 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, 550231102 + ... + 550231395.

It is an arithmetic number, because the mean of its divisors is an integer number (20908787462).

Almost surely, 2^161767987059 is an apocalyptic number.

161767987059 is a deficient number, since it is larger than the sum of its proper divisors (89137462485).

161767987059 is a wasteful number, since it uses less digits than its factorization.

161767987059 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100462514 (or 1100462507 counting only the distinct ones).

The product of its (nonzero) digits is 40007520, while the sum is 66.

The spelling of 161767987059 in words is "one hundred sixty-one billion, seven hundred sixty-seven million, nine hundred eighty-seven thousand, fifty-nine".