78473136109992 has 512 divisors, whose sum is σ = 220285980794880. Its totient is φ = 23141256560640.

The previous prime is 78473136109931. The next prime is 78473136110137. The reversal of 78473136109992 is 29990163137487.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 150044237043 + ... + 150044237565.

It is an arithmetic number, because the mean of its divisors is an integer number (430246056240).

Almost surely, 2^{78473136109992} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78473136109992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110142990397440).

78473136109992 is an abundant number, since it is smaller than the sum of its proper divisors (141812844684888).

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

78473136109992 is a wasteful number, since it uses less digits than its factorization.

78473136109992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1385 (or 1381 counting only the distinct ones).

The product of its (nonzero) digits is 123451776, while the sum is 69.

The spelling of 78473136109992 in words is "seventy-eight trillion, four hundred seventy-three billion, one hundred thirty-six million, one hundred nine thousand, nine hundred ninety-two".