78950281536 has 336 divisors, whose sum is σ = 274879612800. Its totient is φ = 21149614080.

The previous prime is 78950281493. The next prime is 78950281547. The reversal of 78950281536 is 63518205987.

78950281536 is a `hidden beast` number, since 7 + 8 + 9 + 502 + 81 + 53 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (336).

It is a super-2 number, since 2×78950281536² (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 47 ways as a sum of consecutive naturals, for example, 19258815 + ... + 19262913.

Almost surely, 2^78950281536 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 78950281536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137439806400).

78950281536 is an abundant number, since it is smaller than the sum of its proper divisors (195929331264).

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

78950281536 is a wasteful number, since it uses less digits than its factorization.

78950281536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4422 (or 4409 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 54.

The spelling of 78950281536 in words is "seventy-eight billion, nine hundred fifty million, two hundred eighty-one thousand, five hundred thirty-six".