720551451 has 4 divisors (see below), whose sum is σ = 960735272. Its totient is φ = 480367632.

The previous prime is 720551449. The next prime is 720551479. The reversal of 720551451 is 154155027.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 720551451 - 2¹ = 720551449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (720551441) 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, 120091906 + ... + 120091911.

It is an arithmetic number, because the mean of its divisors is an integer number (240183818).

Almost surely, 2^720551451 is an apocalyptic number.

720551451 is a deficient number, since it is larger than the sum of its proper divisors (240183821).

720551451 is a wasteful number, since it uses less digits than its factorization.

720551451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240183820.

The product of its (nonzero) digits is 7000, while the sum is 30.

The square root of 720551451 is about 26843.0894458890. The cubic root of 720551451 is about 896.5097126890.

The spelling of 720551451 in words is "seven hundred twenty million, five hundred fifty-one thousand, four hundred fifty-one".