72536134544 has 10 divisors (see below), whose sum is σ = 140538760710. Its totient is φ = 36268067264.

The previous prime is 72536134543. The next prime is 72536134549. The reversal of 72536134544 is 44543163527.

It can be written as a sum of positive squares in only one way, i.e., 66605286400 + 5930848144 = 258080^2 + 77012^2 .

It is a super-2 number, since 2×72536134544² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 72536134495 and 72536134504.

It is not an unprimeable number, because it can be changed into a prime (72536134543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2266754189 + ... + 2266754220.

It is an arithmetic number, because the mean of its divisors is an integer number (14053876071).

Almost surely, 2^72536134544 is an apocalyptic number.

It is an amenable number.

72536134544 is a deficient number, since it is larger than the sum of its proper divisors (68002626166).

72536134544 is a wasteful number, since it uses less digits than its factorization.

72536134544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4533508417 (or 4533508411 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 44.

The spelling of 72536134544 in words is "seventy-two billion, five hundred thirty-six million, one hundred thirty-four thousand, five hundred forty-four".