161056720507370 has 8 divisors (see below), whose sum is σ = 289902096913284. Its totient is φ = 64422688202944.

The previous prime is 161056720507367. The next prime is 161056720507379. The reversal of 161056720507370 is 73705027650161.

It can be written as a sum of positive squares in 2 ways, for example, as 160302617578489 + 754102928881 = 12661067^2 + 868391^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (161056720507379) 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, 8052836025359 + ... + 8052836025378.

Almost surely, 2^{161056720507370} is an apocalyptic number.

161056720507370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161056720507370 is a deficient number, since it is larger than the sum of its proper divisors (128845376405914).

161056720507370 is a wasteful number, since it uses less digits than its factorization.

161056720507370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16105672050744.

The product of its (nonzero) digits is 1852200, while the sum is 50.

The spelling of 161056720507370 in words is "one hundred sixty-one trillion, fifty-six billion, seven hundred twenty million, five hundred seven thousand, three hundred seventy".