78356709204 has 24 divisors (see below), whose sum is σ = 184043135808. Its totient is φ = 25945929600.

The previous prime is 78356709191. The next prime is 78356709227. The reversal of 78356709204 is 40290765387.

It is a super-2 number, since 2×78356709204² (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, 21619797 + ... + 21623420.

It is an arithmetic number, because the mean of its divisors is an integer number (7668463992).

Almost surely, 2^78356709204 is an apocalyptic number.

It is an amenable number.

78356709204 is an abundant number, since it is smaller than the sum of its proper divisors (105686426604).

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

78356709204 is a wasteful number, since it uses less digits than its factorization.

78356709204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43243375 (or 43243373 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 51.

The spelling of 78356709204 in words is "seventy-eight billion, three hundred fifty-six million, seven hundred nine thousand, two hundred four".