61550454239 has 8 divisors (see below), whose sum is σ = 61718883072. Its totient is φ = 61382220120.

The previous prime is 61550454221. The next prime is 61550454247. The reversal of 61550454239 is 93245405516.

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 61550454239 - 2²⁰ = 61549405663 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 61550454239.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61550454289) 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, 596012 + ... + 691614.

It is an arithmetic number, because the mean of its divisors is an integer number (7714860384).

Almost surely, 2^61550454239 is an apocalyptic number.

61550454239 is a deficient number, since it is larger than the sum of its proper divisors (168428833).

61550454239 is a wasteful number, since it uses less digits than its factorization.

61550454239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97357.

The product of its (nonzero) digits is 648000, while the sum is 44.

The spelling of 61550454239 in words is "sixty-one billion, five hundred fifty million, four hundred fifty-four thousand, two hundred thirty-nine".