61172839499 has 8 divisors (see below), whose sum is σ = 61754082720. Its totient is φ = 60591960576.

The previous prime is 61172839487. The next prime is 61172839501. The reversal of 61172839499 is 99493827116.

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 61172839499 - 2⁸ = 61172839243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61172839459) 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, 252482 + ... + 431384.

It is an arithmetic number, because the mean of its divisors is an integer number (7719260340).

Almost surely, 2^61172839499 is an apocalyptic number.

61172839499 is a deficient number, since it is larger than the sum of its proper divisors (581243221).

61172839499 is a wasteful number, since it uses less digits than its factorization.

61172839499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182149.

The product of its digits is 5878656, while the sum is 59.

The spelling of 61172839499 in words is "sixty-one billion, one hundred seventy-two million, eight hundred thirty-nine thousand, four hundred ninety-nine".