161056665815442 has 16 divisors (see below), whose sum is σ = 322662076666272. Its totient is φ = 53594097765920.

The previous prime is 161056665815417. The next prime is 161056665815459. The reversal of 161056665815442 is 244518566650161.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22864372659 + ... + 22864379702.

It is an arithmetic number, because the mean of its divisors is an integer number (20166379791642).

Almost surely, 2^{161056665815442} is an apocalyptic number.

161056665815442 is an abundant number, since it is smaller than the sum of its proper divisors (161605410850830).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161056665815442 is a wasteful number, since it uses less digits than its factorization.

161056665815442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45728752953.

The product of its (nonzero) digits is 41472000, while the sum is 60.

The spelling of 161056665815442 in words is "one hundred sixty-one trillion, fifty-six billion, six hundred sixty-five million, eight hundred fifteen thousand, four hundred forty-two".