78734614457864 has 16 divisors (see below), whose sum is σ = 148392310930620. Its totient is φ = 39163331543040.

The previous prime is 78734614457861. The next prime is 78734614457869. The reversal of 78734614457864 is 46875441643787.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 72215018235364 + 6519596222500 = 8497942^2 + 2553350^2 .

It is a junction number, because it is equal to n+sod(n) for n = 78734614457791 and 78734614457800.

It is not an unprimeable number, because it can be changed into a prime (78734614457861) 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, 25496959097 + ... + 25496962184.

Almost surely, 2^{78734614457864} is an apocalyptic number.

It is an amenable number.

78734614457864 is a deficient number, since it is larger than the sum of its proper divisors (69657696472756).

78734614457864 is a wasteful number, since it uses less digits than its factorization.

78734614457864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50993921480 (or 50993921476 counting only the distinct ones).

The product of its digits is 3034644480, while the sum is 74.

The spelling of 78734614457864 in words is "seventy-eight trillion, seven hundred thirty-four billion, six hundred fourteen million, four hundred fifty-seven thousand, eight hundred sixty-four".