78858605161015 has 16 divisors (see below), whose sum is σ = 94921463208960. Its totient is φ = 62892913399200.

The previous prime is 78858605160997. The next prime is 78858605161081. The reversal of 78858605161015 is 51016150685887.

It is a happy number.

It is not a de Polignac number, because 78858605161015 - 2¹⁷ = 78858605029943 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2305195 + ... + 12768364.

It is an arithmetic number, because the mean of its divisors is an integer number (5932591450560).

Almost surely, 2^{78858605161015} is an apocalyptic number.

78858605161015 is a deficient number, since it is larger than the sum of its proper divisors (16062858047945).

78858605161015 is a wasteful number, since it uses less digits than its factorization.

78858605161015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15076782.

The product of its (nonzero) digits is 16128000, while the sum is 61.

The spelling of 78858605161015 in words is "seventy-eight trillion, eight hundred fifty-eight billion, six hundred five million, one hundred sixty-one thousand, fifteen".