61277002447 has 4 divisors (see below), whose sum is σ = 61383202336. Its totient is φ = 61170802560.

The previous prime is 61277002439. The next prime is 61277002453. The reversal of 61277002447 is 74420077216.

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 61277002447 - 2³ = 61277002439 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 (61277002417) 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 3 ways as a sum of consecutive naturals, for example, 53099079 + ... + 53100232.

It is an arithmetic number, because the mean of its divisors is an integer number (15345800584).

Almost surely, 2^61277002447 is an apocalyptic number.

61277002447 is a deficient number, since it is larger than the sum of its proper divisors (106199889).

61277002447 is a wasteful number, since it uses less digits than its factorization.

61277002447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106199888.

The product of its (nonzero) digits is 131712, while the sum is 40.

The spelling of 61277002447 in words is "sixty-one billion, two hundred seventy-seven million, two thousand, four hundred forty-seven".