78257530853668 has 12 divisors (see below), whose sum is σ = 136950770159280. Its totient is φ = 39128739379592.

The previous prime is 78257530853657. The next prime is 78257530853693. The reversal of 78257530853668 is 86635803575287.

It is a super-2 number, since 2×78257530853668² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78257530853668.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1285623 + ... + 12576481.

It is an arithmetic number, because the mean of its divisors is an integer number (11412564179940).

Almost surely, 2^{78257530853668} is an apocalyptic number.

It is an amenable number.

78257530853668 is a deficient number, since it is larger than the sum of its proper divisors (58693239305612).

78257530853668 is a wasteful number, since it uses less digits than its factorization.

78257530853668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13023626 (or 13023624 counting only the distinct ones).

The product of its (nonzero) digits is 2032128000, while the sum is 73.

The spelling of 78257530853668 in words is "seventy-eight trillion, two hundred fifty-seven billion, five hundred thirty million, eight hundred fifty-three thousand, six hundred sixty-eight".