78158370908 has 24 divisors (see below), whose sum is σ = 137423662992. Its totient is φ = 38894578304.

The previous prime is 78158370869. The next prime is 78158370923. The reversal of 78158370908 is 80907385187.

It is a super-2 number, since 2×78158370908² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3250466 + ... + 3274422.

It is an arithmetic number, because the mean of its divisors is an integer number (5725985958).

Almost surely, 2^78158370908 is an apocalyptic number.

It is an amenable number.

78158370908 is a deficient number, since it is larger than the sum of its proper divisors (59265292084).

78158370908 is a wasteful number, since it uses less digits than its factorization.

78158370908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27781 (or 27779 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 56.

The spelling of 78158370908 in words is "seventy-eight billion, one hundred fifty-eight million, three hundred seventy thousand, nine hundred eight".