72455121713 has 8 divisors (see below), whose sum is σ = 78047225256. Its totient is φ = 66865680000.

The previous prime is 72455121707. The next prime is 72455121719. The reversal of 72455121713 is 31712155427.

It is an interprime number because it is at equal distance from previous prime (72455121707) and next prime (72455121719).

It can be written as a sum of positive squares in 4 ways, for example, as 7135518784 + 65319602929 = 84472^2 + 255577^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72455121713 - 2²⁰ = 72454073137 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72455121719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 608738 + ... + 717963.

It is an arithmetic number, because the mean of its divisors is an integer number (9755903157).

Almost surely, 2^72455121713 is an apocalyptic number.

It is an amenable number.

72455121713 is a deficient number, since it is larger than the sum of its proper divisors (5592103543).

72455121713 is a wasteful number, since it uses less digits than its factorization.

72455121713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1330915.

The product of its digits is 58800, while the sum is 38.

The spelling of 72455121713 in words is "seventy-two billion, four hundred fifty-five million, one hundred twenty-one thousand, seven hundred thirteen".