78275909716 has 6 divisors (see below), whose sum is σ = 136982842010. Its totient is φ = 39137954856.

The previous prime is 78275909681. The next prime is 78275909717. The reversal of 78275909716 is 61790957287.

It can be written as a sum of positive squares in only one way, i.e., 76873107600 + 1402802116 = 277260^2 + 37454^2 .

It is a super-2 number, since 2×78275909716² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78275909717) 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 as a sum of consecutive naturals, namely, 9784488711 + ... + 9784488718.

Almost surely, 2^78275909716 is an apocalyptic number.

It is an amenable number.

78275909716 is a deficient number, since it is larger than the sum of its proper divisors (58706932294).

78275909716 is a wasteful number, since it uses less digits than its factorization.

78275909716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19568977433 (or 19568977431 counting only the distinct ones).

The product of its (nonzero) digits is 13335840, while the sum is 61.

The spelling of 78275909716 in words is "seventy-eight billion, two hundred seventy-five million, nine hundred nine thousand, seven hundred sixteen".