61172783339 has 4 divisors (see below), whose sum is σ = 62085810024. Its totient is φ = 60259756656.

The previous prime is 61172783333. The next prime is 61172783351. The reversal of 61172783339 is 93338727116.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61172783339 - 2¹⁶ = 61172717803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61172783333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 456513242 + ... + 456513375.

It is an arithmetic number, because the mean of its divisors is an integer number (15521452506).

Almost surely, 2^61172783339 is an apocalyptic number.

61172783339 is a deficient number, since it is larger than the sum of its proper divisors (913026685).

61172783339 is an equidigital number, since it uses as much as digits as its factorization.

61172783339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 913026684.

The product of its digits is 1143072, while the sum is 50.

The spelling of 61172783339 in words is "sixty-one billion, one hundred seventy-two million, seven hundred eighty-three thousand, three hundred thirty-nine".