161359311657 has 8 divisors (see below), whose sum is σ = 215323120384. Its totient is φ = 107484188688.

The previous prime is 161359311643. The next prime is 161359311667. The reversal of 161359311657 is 756113953161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 161359311657 - 2¹¹ = 161359309609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161359311667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22167193 + ... + 22174470.

It is an arithmetic number, because the mean of its divisors is an integer number (26915390048).

Almost surely, 2^161359311657 is an apocalyptic number.

It is an amenable number.

161359311657 is a deficient number, since it is larger than the sum of its proper divisors (53963808727).

161359311657 is a wasteful number, since it uses less digits than its factorization.

161359311657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44342879.

The product of its digits is 510300, while the sum is 48.

The spelling of 161359311657 in words is "one hundred sixty-one billion, three hundred fifty-nine million, three hundred eleven thousand, six hundred fifty-seven".