78123212204 has 6 divisors (see below), whose sum is σ = 136715621364. Its totient is φ = 39061606100.

The previous prime is 78123212113. The next prime is 78123212239. The reversal of 78123212204 is 40221232187.

It is a super-2 number, since 2×78123212204² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9765401522 + ... + 9765401529.

It is an arithmetic number, because the mean of its divisors is an integer number (22785936894).

Almost surely, 2^78123212204 is an apocalyptic number.

It is an amenable number.

78123212204 is a deficient number, since it is larger than the sum of its proper divisors (58592409160).

78123212204 is a wasteful number, since it uses less digits than its factorization.

78123212204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19530803055 (or 19530803053 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 32.

The spelling of 78123212204 in words is "seventy-eight billion, one hundred twenty-three million, two hundred twelve thousand, two hundred four".