72451617207 has 8 divisors (see below), whose sum is σ = 98043979776. Its totient is φ = 47580166392.

The previous prime is 72451617181. The next prime is 72451617221. The reversal of 72451617207 is 70271615427.

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

It is not a de Polignac number, because 72451617207 - 2¹⁹ = 72451092919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72451617257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 180227703 + ... + 180228104.

It is an arithmetic number, because the mean of its divisors is an integer number (12255497472).

Almost surely, 2^72451617207 is an apocalyptic number.

72451617207 is a deficient number, since it is larger than the sum of its proper divisors (25592362569).

72451617207 is a wasteful number, since it uses less digits than its factorization.

72451617207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360455877.

The product of its (nonzero) digits is 164640, while the sum is 42.

The spelling of 72451617207 in words is "seventy-two billion, four hundred fifty-one million, six hundred seventeen thousand, two hundred seven".