78643650141 has 80 divisors (see below), whose sum is σ = 136787537920. Its totient is φ = 44099367840.

The previous prime is 78643650091. The next prime is 78643650193. The reversal of 78643650141 is 14105634687.

78643650141 is a `hidden beast` number, since 78 + 6 + 4 + 36 + 501 + 41 = 666.

It is not a de Polignac number, because 78643650141 - 2²¹ = 78641552989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78643650341) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 10291200 + ... + 10298838.

It is an arithmetic number, because the mean of its divisors is an integer number (1709844224).

Almost surely, 2^78643650141 is an apocalyptic number.

It is an amenable number.

78643650141 is a deficient number, since it is larger than the sum of its proper divisors (58143887779).

78643650141 is a wasteful number, since it uses less digits than its factorization.

78643650141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7996 (or 7987 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 78643650141 in words is "seventy-eight billion, six hundred forty-three million, six hundred fifty thousand, one hundred forty-one".