78882037464640 has 56 divisors (see below), whose sum is σ = 190410973025400. Its totient is φ = 31120584634368.

The previous prime is 78882037464599. The next prime is 78882037464641. The reversal of 78882037464640 is 4646473028887.

It can be written as a sum of positive squares in 4 ways, for example, as 6872828505664 + 72009208958976 = 2621608^2 + 8485824^2 .

It is not an unprimeable number, because it can be changed into a prime (78882037464641) 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, 1688376415 + ... + 1688423134.

Almost surely, 2^{78882037464640} is an apocalyptic number.

It is an amenable number.

78882037464640 is an abundant number, since it is smaller than the sum of its proper divisors (111528935560760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78882037464640 is a wasteful number, since it uses less digits than its factorization.

78882037464640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3376799639 (or 3376799629 counting only the distinct ones).

The product of its (nonzero) digits is 346816512, while the sum is 67.

The spelling of 78882037464640 in words is "seventy-eight trillion, eight hundred eighty-two billion, thirty-seven million, four hundred sixty-four thousand, six hundred forty".