61321631177 has 8 divisors (see below), whose sum is σ = 62483502600. Its totient is φ = 60159939840.

The previous prime is 61321631153. The next prime is 61321631183. The reversal of 61321631177 is 77113612316.

It can be written as a sum of positive squares in 4 ways, for example, as 8699106361 + 52622524816 = 93269^2 + 229396^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61321631177 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61321631177.

It is not an unprimeable number, because it can be changed into a prime (61321631117) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 786449 + ... + 860897.

It is an arithmetic number, because the mean of its divisors is an integer number (7810437825).

Almost surely, 2^61321631177 is an apocalyptic number.

It is an amenable number.

61321631177 is a deficient number, since it is larger than the sum of its proper divisors (1161871423).

61321631177 is a wasteful number, since it uses less digits than its factorization.

61321631177 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90043.

The product of its digits is 31752, while the sum is 38.

The spelling of 61321631177 in words is "sixty-one billion, three hundred twenty-one million, six hundred thirty-one thousand, one hundred seventy-seven".