78862247650138 has 8 divisors (see below), whose sum is σ = 118296363257460. Its totient is φ = 39430126564320.

The previous prime is 78862247650117. The next prime is 78862247650141. The reversal of 78862247650138 is 83105674226887.

It can be written as a sum of positive squares in 2 ways, for example, as 62680108223929 + 16182139426209 = 7917077^2 + 4022703^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 498531523 + ... + 498689686.

Almost surely, 2^{78862247650138} is an apocalyptic number.

78862247650138 is a deficient number, since it is larger than the sum of its proper divisors (39434115607322).

78862247650138 is a wasteful number, since it uses less digits than its factorization.

78862247650138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 997260752.

The product of its (nonzero) digits is 216760320, while the sum is 67.

The spelling of 78862247650138 in words is "seventy-eight trillion, eight hundred sixty-two billion, two hundred forty-seven million, six hundred fifty thousand, one hundred thirty-eight".