161156551026 has 32 divisors (see below), whose sum is σ = 336404130048. Its totient is φ = 51419788160.

The previous prime is 161156551013. The next prime is 161156551033. The reversal of 161156551026 is 620155651161.

161156551026 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6167226 + ... + 6193301.

It is an arithmetic number, because the mean of its divisors is an integer number (10512629064).

Almost surely, 2^161156551026 is an apocalyptic number.

161156551026 is an abundant number, since it is smaller than the sum of its proper divisors (175247579022).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161156551026 is a wasteful number, since it uses less digits than its factorization.

161156551026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12360626.

The product of its (nonzero) digits is 54000, while the sum is 39.

The spelling of 161156551026 in words is "one hundred sixty-one billion, one hundred fifty-six million, five hundred fifty-one thousand, twenty-six".