78507453512457 has 6 divisors (see below), whose sum is σ = 113399655073562. Its totient is φ = 52338302341632.

The previous prime is 78507453512413. The next prime is 78507453512459. The reversal of 78507453512457 is 75421535470587.

78507453512457 is a `hidden beast` number, since 7 + 8 + 5 + 0 + 7 + 453 + 5 + 124 + 57 = 666.

It can be written as a sum of positive squares in only one way, i.e., 67510609322256 + 10996844190201 = 8216484^2 + 3316149^2 .

It is not a de Polignac number, because 78507453512457 - 2³⁴ = 78490273643273 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78507453512394 and 78507453512403.

It is not an unprimeable number, because it can be changed into a prime (78507453512459) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4361525195128 + ... + 4361525195145.

Almost surely, 2^{78507453512457} is an apocalyptic number.

It is an amenable number.

78507453512457 is a deficient number, since it is larger than the sum of its proper divisors (34892201561105).

78507453512457 is a wasteful number, since it uses less digits than its factorization.

78507453512457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8723050390279 (or 8723050390276 counting only the distinct ones).

The product of its (nonzero) digits is 164640000, while the sum is 63.

The spelling of 78507453512457 in words is "seventy-eight trillion, five hundred seven billion, four hundred fifty-three million, five hundred twelve thousand, four hundred fifty-seven".