78146647808265 has 32 divisors (see below), whose sum is σ = 139379906117760. Its totient is φ = 41542452493632.

The previous prime is 78146647808263. The next prime is 78146647808287. The reversal of 78146647808265 is 56280874664187.

78146647808265 is a `hidden beast` number, since 7 + 8 + 1 + 466 + 4 + 7 + 80 + 82 + 6 + 5 = 666.

78146647808265 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 78146647808265 - 2¹ = 78146647808263 is a prime.

It is a super-2 number, since 2×78146647808265² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78146647808193 and 78146647808202.

It is not an unprimeable number, because it can be changed into a prime (78146647808263) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 942733894 + ... + 942816783.

It is an arithmetic number, because the mean of its divisors is an integer number (4355622066180).

Almost surely, 2^{78146647808265} is an apocalyptic number.

It is an amenable number.

78146647808265 is a deficient number, since it is larger than the sum of its proper divisors (61233258309495).

78146647808265 is a wasteful number, since it uses less digits than its factorization.

78146647808265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1885550998 (or 1885550992 counting only the distinct ones).

The product of its (nonzero) digits is 867041280, while the sum is 72.

The spelling of 78146647808265 in words is "seventy-eight trillion, one hundred forty-six billion, six hundred forty-seven million, eight hundred eight thousand, two hundred sixty-five".