79736647536 has 480 divisors, whose sum is σ = 292566496768. Its totient is φ = 20457722880.

The previous prime is 79736647531. The next prime is 79736647541. The reversal of 79736647536 is 63574663797.

79736647536 is a `hidden beast` number, since 7 + 9 + 7 + 36 + 64 + 7 + 536 = 666.

It is an interprime number because it is at equal distance from previous prime (79736647531) and next prime (79736647541).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79736647531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 13087851 + ... + 13093941.

Almost surely, 2^79736647536 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 79736647536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146283248384).

79736647536 is an abundant number, since it is smaller than the sum of its proper divisors (212829849232).

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

79736647536 is a wasteful number, since it uses less digits than its factorization.

79736647536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6171 (or 6153 counting only the distinct ones).

The product of its digits is 120022560, while the sum is 63.

The spelling of 79736647536 in words is "seventy-nine billion, seven hundred thirty-six million, six hundred forty-seven thousand, five hundred thirty-six".