72663449413 has 4 divisors (see below), whose sum is σ = 72667038880. Its totient is φ = 72659859948.

The previous prime is 72663449399. The next prime is 72663449477. The reversal of 72663449413 is 31494436627.

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.

It is a cyclic number.

It is not a de Polignac number, because 72663449413 - 2²¹ = 72661352261 is a prime.

It is a super-2 number, since 2×72663449413² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72663441413) 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, 1764195 + ... + 1804912.

It is an arithmetic number, because the mean of its divisors is an integer number (18166759720).

Almost surely, 2^72663449413 is an apocalyptic number.

It is an amenable number.

72663449413 is a deficient number, since it is larger than the sum of its proper divisors (3589467).

72663449413 is a wasteful number, since it uses less digits than its factorization.

72663449413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3589466.

The product of its digits is 2612736, while the sum is 49.

The spelling of 72663449413 in words is "seventy-two billion, six hundred sixty-three million, four hundred forty-nine thousand, four hundred thirteen".