161198402659 has 4 divisors (see below), whose sum is σ = 184226745904. Its totient is φ = 138170059416.

The previous prime is 161198402639. The next prime is 161198402671. The reversal of 161198402659 is 956204891161.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161198402659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161198402639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11514171612 + ... + 11514171625.

It is an arithmetic number, because the mean of its divisors is an integer number (46056686476).

Almost surely, 2^161198402659 is an apocalyptic number.

161198402659 is a deficient number, since it is larger than the sum of its proper divisors (23028343245).

161198402659 is an equidigital number, since it uses as much as digits as its factorization.

161198402659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23028343244.

The product of its (nonzero) digits is 933120, while the sum is 52.

The spelling of 161198402659 in words is "one hundred sixty-one billion, one hundred ninety-eight million, four hundred two thousand, six hundred fifty-nine".