61487678416 has 10 divisors (see below), whose sum is σ = 119132376962. Its totient is φ = 30743839200.

The previous prime is 61487678401. The next prime is 61487678459.

It is a happy number.

61487678416 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 50713238416 + 10774440000 = 225196^2 + 103800^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1921489935 + ... + 1921489966.

Almost surely, 2^61487678416 is an apocalyptic number.

It is an amenable number.

61487678416 is a deficient number, since it is larger than the sum of its proper divisors (57644698546).

61487678416 is a wasteful number, since it uses less digits than its factorization.

61487678416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3842979909 (or 3842979903 counting only the distinct ones).

The product of its digits is 10838016, while the sum is 58.

The spelling of 61487678416 in words is "sixty-one billion, four hundred eighty-seven million, six hundred seventy-eight thousand, four hundred sixteen".