61366571399 has 8 divisors (see below), whose sum is σ = 70273776000. Its totient is φ = 52494504696.

The previous prime is 61366571369. The next prime is 61366571417. The reversal of 61366571399 is 99317566316.

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-61366571399 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 (61366571309) 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, 8780729 + ... + 8787714.

It is an arithmetic number, because the mean of its divisors is an integer number (8784222000).

Almost surely, 2^61366571399 is an apocalyptic number.

61366571399 is a deficient number, since it is larger than the sum of its proper divisors (8907204601).

61366571399 is a wasteful number, since it uses less digits than its factorization.

61366571399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17568949.

The product of its digits is 5511240, while the sum is 56.

The spelling of 61366571399 in words is "sixty-one billion, three hundred sixty-six million, five hundred seventy-one thousand, three hundred ninety-nine".