78485757970 has 16 divisors (see below), whose sum is σ = 143590338648. Its totient is φ = 30879642240.

The previous prime is 78485757923. The next prime is 78485757971. The reversal of 78485757970 is 7975758487.

It can be written as a sum of positive squares in 4 ways, for example, as 63070797321 + 15414960649 = 251139^2 + 124157^2 .

It is a junction number, because it is equal to n+sod(n) for n = 78485757896 and 78485757905.

It is not an unprimeable number, because it can be changed into a prime (78485757971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64331979 + ... + 64333198.

Almost surely, 2^78485757970 is an apocalyptic number.

78485757970 is a deficient number, since it is larger than the sum of its proper divisors (65104580678).

78485757970 is a wasteful number, since it uses less digits than its factorization.

78485757970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128665245.

The product of its (nonzero) digits is 138297600, while the sum is 67.

The spelling of 78485757970 in words is "seventy-eight billion, four hundred eighty-five million, seven hundred fifty-seven thousand, nine hundred seventy".