1161051556061 has 8 divisors (see below), whose sum is σ = 1179025295448. Its totient is φ = 1143204840000.

The previous prime is 1161051556013. The next prime is 1161051556121. The reversal of 1161051556061 is 1606551501611.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 184895700025 + 976155856036 = 429995^2 + 988006^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1161051556061 - 2⁶ = 1161051555997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161021556061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31737410 + ... + 31773971.

It is an arithmetic number, because the mean of its divisors is an integer number (147378161931).

Almost surely, 2^{1161051556061} is an apocalyptic number.

It is an amenable number.

1161051556061 is a deficient number, since it is larger than the sum of its proper divisors (17973739387).

1161051556061 is a wasteful number, since it uses less digits than its factorization.

1161051556061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63511663.

The product of its (nonzero) digits is 27000, while the sum is 38.

The spelling of 1161051556061 in words is "one trillion, one hundred sixty-one billion, fifty-one million, five hundred fifty-six thousand, sixty-one".