78818153038641 has 80 divisors (see below), whose sum is σ = 124549273252800. Its totient is φ = 49534646055552.

The previous prime is 78818153038621. The next prime is 78818153038733. The reversal of 78818153038641 is 14683035181887.

78818153038641 is a `hidden beast` number, since 7 + 8 + 8 + 1 + 8 + 1 + 530 + 38 + 64 + 1 = 666.

It is not a de Polignac number, because 78818153038641 - 2⁵ = 78818153038609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78818153038621) 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, 342255451 + ... + 342485663.

It is an arithmetic number, because the mean of its divisors is an integer number (1556865915660).

Almost surely, 2^{78818153038641} is an apocalyptic number.

It is an amenable number.

78818153038641 is a deficient number, since it is larger than the sum of its proper divisors (45731120214159).

78818153038641 is a wasteful number, since it uses less digits than its factorization.

78818153038641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231340 (or 231331 counting only the distinct ones).

The product of its (nonzero) digits is 30965760, while the sum is 63.

The spelling of 78818153038641 in words is "seventy-eight trillion, eight hundred eighteen billion, one hundred fifty-three million, thirty-eight thousand, six hundred forty-one".