78696493505 has 16 divisors (see below), whose sum is σ = 107971023360. Its totient is φ = 53941108032.

The previous prime is 78696493501. The next prime is 78696493537. The reversal of 78696493505 is 50539469687.

It is not a de Polignac number, because 78696493505 - 2² = 78696493501 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78696493501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 376025 + ... + 546614.

It is an arithmetic number, because the mean of its divisors is an integer number (6748188960).

Almost surely, 2^78696493505 is an apocalyptic number.

It is an amenable number.

78696493505 is a deficient number, since it is larger than the sum of its proper divisors (29274529855).

78696493505 is a wasteful number, since it uses less digits than its factorization.

78696493505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 925088.

The product of its (nonzero) digits is 48988800, while the sum is 62.

The spelling of 78696493505 in words is "seventy-eight billion, six hundred ninety-six million, four hundred ninety-three thousand, five hundred five".