61547868133 has 8 divisors (see below), whose sum is σ = 62192413080. Its totient is φ = 60904012800.

The previous prime is 61547868073. The next prime is 61547868163. The reversal of 61547868133 is 33186874516.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 38376026404 + 23171841729 = 195898^2 + 152223^2 .

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 61547868133 - 2³³ = 52957933541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61547868163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8013 + ... + 350941.

It is an arithmetic number, because the mean of its divisors is an integer number (7774051635).

Almost surely, 2^61547868133 is an apocalyptic number.

It is an amenable number.

61547868133 is a deficient number, since it is larger than the sum of its proper divisors (644544947).

61547868133 is a wasteful number, since it uses less digits than its factorization.

61547868133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344807.

The product of its digits is 2903040, while the sum is 52.

The spelling of 61547868133 in words is "sixty-one billion, five hundred forty-seven million, eight hundred sixty-eight thousand, one hundred thirty-three".