720451215447 has 16 divisors (see below), whose sum is σ = 1025677771008. Its totient is φ = 448734021120.

The previous prime is 720451215433. The next prime is 720451215479. The reversal of 720451215447 is 744512154027.

It is not a de Polignac number, because 720451215447 - 2¹¹ = 720451213399 is a prime.

It is a super-2 number, since 2×720451215447² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 720451215399 and 720451215408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720451215347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121407754 + ... + 121413687.

It is an arithmetic number, because the mean of its divisors is an integer number (64104860688).

Almost surely, 2^720451215447 is an apocalyptic number.

720451215447 is a deficient number, since it is larger than the sum of its proper divisors (305226555561).

720451215447 is a wasteful number, since it uses less digits than its factorization.

720451215447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242821510.

The product of its (nonzero) digits is 313600, while the sum is 42.

The spelling of 720451215447 in words is "seven hundred twenty billion, four hundred fifty-one million, two hundred fifteen thousand, four hundred forty-seven".