161161551106534 has 64 divisors (see below), whose sum is σ = 274934236262400. Its totient is φ = 70189958448000.

The previous prime is 161161551106531. The next prime is 161161551106553. The reversal of 161161551106534 is 435601155161161.

It is a super-3 number, since 3×161161551106534³ (a number of 44 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161161551106531) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29053432 + ... + 34152964.

It is an arithmetic number, because the mean of its divisors is an integer number (4295847441600).

Almost surely, 2^{161161551106534} is an apocalyptic number.

161161551106534 is a deficient number, since it is larger than the sum of its proper divisors (113772685155866).

161161551106534 is a wasteful number, since it uses less digits than its factorization.

161161551106534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5100037.

The product of its (nonzero) digits is 324000, while the sum is 46.

The spelling of 161161551106534 in words is "one hundred sixty-one trillion, one hundred sixty-one billion, five hundred fifty-one million, one hundred six thousand, five hundred thirty-four".