78711629378 has 18 divisors (see below), whose sum is σ = 118655383257. Its totient is φ = 39160804200.

The previous prime is 78711629377. The next prime is 78711629471. The reversal of 78711629378 is 87392611787.

It can be written as a sum of positive squares in 2 ways, for example, as 66467542969 + 12244086409 = 257813^2 + 110653^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=198383.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78711629371) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 112284428 + ... + 112285128.

Almost surely, 2^78711629378 is an apocalyptic number.

78711629378 is a deficient number, since it is larger than the sum of its proper divisors (39943753879).

78711629378 is an frugal number, since it uses more digits than its factorization.

78711629378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1970 (or 986 counting only the distinct ones).

The product of its digits is 7112448, while the sum is 59.

The spelling of 78711629378 in words is "seventy-eight billion, seven hundred eleven million, six hundred twenty-nine thousand, three hundred seventy-eight".