78515641375242 has 16 divisors (see below), whose sum is σ = 163858729826880. Its totient is φ = 25033972612352.

The previous prime is 78515641375207. The next prime is 78515641375313. The reversal of 78515641375242 is 24257314651587.

It is a super-2 number, since 2×78515641375242² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 284476961367 + ... + 284476961642.

It is an arithmetic number, because the mean of its divisors is an integer number (10241170614180).

Almost surely, 2^{78515641375242} is an apocalyptic number.

78515641375242 is an abundant number, since it is smaller than the sum of its proper divisors (85343088451638).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78515641375242 is a wasteful number, since it uses less digits than its factorization.

78515641375242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568953923037.

The product of its digits is 56448000, while the sum is 60.

The spelling of 78515641375242 in words is "seventy-eight trillion, five hundred fifteen billion, six hundred forty-one million, three hundred seventy-five thousand, two hundred forty-two".