161852074557 has 4 divisors (see below), whose sum is σ = 215802766080. Its totient is φ = 107901383036.

The previous prime is 161852074543. The next prime is 161852074613. The reversal of 161852074557 is 755470258161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 161852074557 - 2¹¹ = 161852072509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161852074507) 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, 26975345757 + ... + 26975345762.

It is an arithmetic number, because the mean of its divisors is an integer number (53950691520).

Almost surely, 2^161852074557 is an apocalyptic number.

It is an amenable number.

161852074557 is a deficient number, since it is larger than the sum of its proper divisors (53950691523).

161852074557 is an equidigital number, since it uses as much as digits as its factorization.

161852074557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53950691522.

The product of its (nonzero) digits is 2352000, while the sum is 51.

The spelling of 161852074557 in words is "one hundred sixty-one billion, eight hundred fifty-two million, seventy-four thousand, five hundred fifty-seven".