72464063897 has 4 divisors (see below), whose sum is σ = 72488823936. Its totient is φ = 72439303860.

The previous prime is 72464063887. The next prime is 72464063899. The reversal of 72464063897 is 79836046427.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 79836046427 = 146989 ⋅543143.

It is a cyclic number.

It is not a de Polignac number, because 72464063897 - 2¹⁶ = 72463998361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72464063899) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12375629 + ... + 12381482.

It is an arithmetic number, because the mean of its divisors is an integer number (18122205984).

Almost surely, 2^72464063897 is an apocalyptic number.

It is an amenable number.

72464063897 is a deficient number, since it is larger than the sum of its proper divisors (24760039).

72464063897 is a wasteful number, since it uses less digits than its factorization.

72464063897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24760038.

The product of its (nonzero) digits is 12192768, while the sum is 56.

The spelling of 72464063897 in words is "seventy-two billion, four hundred sixty-four million, sixty-three thousand, eight hundred ninety-seven".