161556015051076 has 24 divisors (see below), whose sum is σ = 282860522306264. Its totient is φ = 80738732067840.

The previous prime is 161556015051023. The next prime is 161556015051089. The reversal of 161556015051076 is 670150510655161.

It can be written as a sum of positive squares in 4 ways, for example, as 86022360230976 + 75533654820100 = 9274824^2 + 8691010^2 .

It is a super-2 number, since 2×161556015051076² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70117546 + ... + 72384958.

Almost surely, 2^{161556015051076} is an apocalyptic number.

It is an amenable number.

161556015051076 is a deficient number, since it is larger than the sum of its proper divisors (121304507255188).

161556015051076 is a wasteful number, since it uses less digits than its factorization.

161556015051076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2276071 (or 2276069 counting only the distinct ones).

The product of its (nonzero) digits is 945000, while the sum is 49.

The spelling of 161556015051076 in words is "one hundred sixty-one trillion, five hundred fifty-six billion, fifteen million, fifty-one thousand, seventy-six".