161536023634557 has 128 divisors (see below), whose sum is σ = 260148356278272. Its totient is φ = 87845708390400.

The previous prime is 161536023634543. The next prime is 161536023634603. The reversal of 161536023634557 is 755436320635161.

161536023634557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 161536023634557 - 2¹² = 161536023630461 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161536023634497 and 161536023634506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161536023634957) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 24207403173 + ... + 24207409845.

It is an arithmetic number, because the mean of its divisors is an integer number (2032409033424).

Almost surely, 2^{161536023634557} is an apocalyptic number.

It is an amenable number.

161536023634557 is a deficient number, since it is larger than the sum of its proper divisors (98612332643715).

161536023634557 is a wasteful number, since it uses less digits than its factorization.

161536023634557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11531.

The product of its (nonzero) digits is 40824000, while the sum is 57.

The spelling of 161536023634557 in words is "one hundred sixty-one trillion, five hundred thirty-six billion, twenty-three million, six hundred thirty-four thousand, five hundred fifty-seven".