72447977974399 has 2 divisors, whose sum is σ = 72447977974400. Its totient is φ = 72447977974398.

The previous prime is 72447977974373. The next prime is 72447977974429. The reversal of 72447977974399 is 99347977974427.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72447977974399 - 2⁹ = 72447977973887 is a prime.

It is a super-2 number, since 2×72447977974399² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72447977972399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36223988987199 + 36223988987200.

It is an arithmetic number, because the mean of its divisors is an integer number (36223988987200).

Almost surely, 2^{72447977974399} is an apocalyptic number.

72447977974399 is a deficient number, since it is larger than the sum of its proper divisors (1).

72447977974399 is an equidigital number, since it uses as much as digits as its factorization.

72447977974399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42343959168, while the sum is 88.

The spelling of 72447977974399 in words is "seventy-two trillion, four hundred forty-seven billion, nine hundred seventy-seven million, nine hundred seventy-four thousand, three hundred ninety-nine".