78728642607 has 16 divisors (see below), whose sum is σ = 107367799680. Its totient is φ = 51297908832.

The previous prime is 78728642593. The next prime is 78728642621. The reversal of 78728642607 is 70624682787.

It is an interprime number because it is at equal distance from previous prime (78728642593) and next prime (78728642621).

It is not a de Polignac number, because 78728642607 - 2⁶ = 78728642543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78728642647) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 1254913 + ... + 1316154.

It is an arithmetic number, because the mean of its divisors is an integer number (6710487480).

Almost surely, 2^78728642607 is an apocalyptic number.

78728642607 is a deficient number, since it is larger than the sum of its proper divisors (28639157073).

78728642607 is a wasteful number, since it uses less digits than its factorization.

78728642607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2571302.

The product of its (nonzero) digits is 12644352, while the sum is 57.

The spelling of 78728642607 in words is "seventy-eight billion, seven hundred twenty-eight million, six hundred forty-two thousand, six hundred seven".