1161742172546 has 8 divisors (see below), whose sum is σ = 1742620859004. Its totient is φ = 580868552880.

The previous prime is 1161742172519. The next prime is 1161742172551. The reversal of 1161742172546 is 6452712471611.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1109101753321 + 52640419225 = 1053139^2 + 229435^2 .

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

It is a super-2 number, since 2×1161742172546² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1161742172546.

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 3 ways as a sum of consecutive naturals, for example, 629345 + ... + 1649108.

Almost surely, 2^{1161742172546} is an apocalyptic number.

1161742172546 is a deficient number, since it is larger than the sum of its proper divisors (580878686458).

1161742172546 is a wasteful number, since it uses less digits than its factorization.

1161742172546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2533396.

The product of its digits is 564480, while the sum is 47.

The spelling of 1161742172546 in words is "one trillion, one hundred sixty-one billion, seven hundred forty-two million, one hundred seventy-two thousand, five hundred forty-six".