72447636686895 has 96 divisors (see below), whose sum is σ = 128972955631104. Its totient is φ = 37607346144000.

The previous prime is 72447636686891. The next prime is 72447636687053. The reversal of 72447636686895 is 59868663674427.

72447636686895 is a `hidden beast` number, since 7 + 2 + 4 + 476 + 3 + 6 + 68 + 6 + 89 + 5 = 666.

It is not a de Polignac number, because 72447636686895 - 2² = 72447636686891 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72447636686891) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 369436620 + ... + 369632670.

It is an arithmetic number, because the mean of its divisors is an integer number (1343468287824).

Almost surely, 2^{72447636686895} is an apocalyptic number.

72447636686895 is a deficient number, since it is larger than the sum of its proper divisors (56525318944209).

72447636686895 is a wasteful number, since it uses less digits than its factorization.

72447636686895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197533 (or 197530 counting only the distinct ones).

The product of its digits is 17557585920, while the sum is 81.

The spelling of 72447636686895 in words is "seventy-two trillion, four hundred forty-seven billion, six hundred thirty-six million, six hundred eighty-six thousand, eight hundred ninety-five".