78152312205857 has 8 divisors (see below), whose sum is σ = 78317527555392. Its totient is φ = 77987121433200.

The previous prime is 78152312205833. The next prime is 78152312205859. The reversal of 78152312205857 is 75850221325187.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78152312205857 - 2³⁸ = 77877434298913 is a prime.

It is a super-2 number, since 2×78152312205857² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78152312205859) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 229307 + ... + 12504287.

It is an arithmetic number, because the mean of its divisors is an integer number (9789690944424).

Almost surely, 2^{78152312205857} is an apocalyptic number.

It is an amenable number.

78152312205857 is a deficient number, since it is larger than the sum of its proper divisors (165215349535).

78152312205857 is a wasteful number, since it uses less digits than its factorization.

78152312205857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12288439.

The product of its (nonzero) digits is 9408000, while the sum is 56.

The spelling of 78152312205857 in words is "seventy-eight trillion, one hundred fifty-two billion, three hundred twelve million, two hundred five thousand, eight hundred fifty-seven".