78465743047172 has 48 divisors (see below), whose sum is σ = 148224418874112. Its totient is φ = 36130158276480.

The previous prime is 78465743047033. The next prime is 78465743047183. The reversal of 78465743047172 is 27174034756487.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 78465743047099 and 78465743047108.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36926522 + ... + 38993582.

It is an arithmetic number, because the mean of its divisors is an integer number (3088008726544).

Almost surely, 2^{78465743047172} is an apocalyptic number.

It is an amenable number.

78465743047172 is a deficient number, since it is larger than the sum of its proper divisors (69758675826940).

78465743047172 is a wasteful number, since it uses less digits than its factorization.

78465743047172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2068788 (or 2068786 counting only the distinct ones).

The product of its (nonzero) digits is 221276160, while the sum is 65.

The spelling of 78465743047172 in words is "seventy-eight trillion, four hundred sixty-five billion, seven hundred forty-three million, forty-seven thousand, one hundred seventy-two".