78650987655 has 16 divisors (see below), whose sum is σ = 126320071680. Its totient is φ = 41787696288.

The previous prime is 78650987651. The next prime is 78650987677. The reversal of 78650987655 is 55678905687.

It is not a de Polignac number, because 78650987655 - 2² = 78650987651 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78650987651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9964495 + ... + 9972384.

It is an arithmetic number, because the mean of its divisors is an integer number (7895004480).

Almost surely, 2^78650987655 is an apocalyptic number.

78650987655 is a deficient number, since it is larger than the sum of its proper divisors (47669084025).

78650987655 is a wasteful number, since it uses less digits than its factorization.

78650987655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19937150.

The product of its (nonzero) digits is 127008000, while the sum is 66.

The spelling of 78650987655 in words is "seventy-eight billion, six hundred fifty million, nine hundred eighty-seven thousand, six hundred fifty-five".