161245633202557 has 8 divisors (see below), whose sum is σ = 168264057540096. Its totient is φ = 154227854251152.

The previous prime is 161245633202501. The next prime is 161245633202569. The reversal of 161245633202557 is 755202336542161.

161245633202557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161245633202557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161245633205557) 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, 160835938 + ... + 161835379.

It is an arithmetic number, because the mean of its divisors is an integer number (21033007192512).

Almost surely, 2^{161245633202557} is an apocalyptic number.

It is an amenable number.

161245633202557 is a deficient number, since it is larger than the sum of its proper divisors (7018424337539).

161245633202557 is a wasteful number, since it uses less digits than its factorization.

161245633202557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322693067.

The product of its (nonzero) digits is 9072000, while the sum is 52.

The spelling of 161245633202557 in words is "one hundred sixty-one trillion, two hundred forty-five billion, six hundred thirty-three million, two hundred two thousand, five hundred fifty-seven".