78628749277 has 32 divisors (see below), whose sum is σ = 88542720000. Its totient is φ = 69330539520.

The previous prime is 78628749259. The next prime is 78628749281. The reversal of 78628749277 is 77294782687.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78628749277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78628749677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25786849 + ... + 25789897.

It is an arithmetic number, because the mean of its divisors is an integer number (2766960000).

Almost surely, 2^78628749277 is an apocalyptic number.

It is an amenable number.

78628749277 is a deficient number, since it is larger than the sum of its proper divisors (9913970723).

78628749277 is a wasteful number, since it uses less digits than its factorization.

78628749277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3901.

The product of its digits is 132765696, while the sum is 67.

The spelling of 78628749277 in words is "seventy-eight billion, six hundred twenty-eight million, seven hundred forty-nine thousand, two hundred seventy-seven".