61718478547 has 8 divisors (see below), whose sum is σ = 67366948032. Its totient is φ = 56076292200.

The previous prime is 61718478527. The next prime is 61718478551. The reversal of 61718478547 is 74587481716.

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 61718478547 - 2¹¹ = 61718476499 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61718478491 and 61718478500.

It is not an unprimeable number, because it can be changed into a prime (61718478517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1550229 + ... + 1589542.

It is an arithmetic number, because the mean of its divisors is an integer number (8420868504).

Almost surely, 2^61718478547 is an apocalyptic number.

61718478547 is a deficient number, since it is larger than the sum of its proper divisors (5648469485).

61718478547 is a wasteful number, since it uses less digits than its factorization.

61718478547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3141569.

The product of its digits is 10536960, while the sum is 58.

The spelling of 61718478547 in words is "sixty-one billion, seven hundred eighteen million, four hundred seventy-eight thousand, five hundred forty-seven".