720387534145 has 4 divisors (see below), whose sum is σ = 864465040980. Its totient is φ = 576310027312.

The previous prime is 720387534091. The next prime is 720387534157. The reversal of 720387534145 is 541435783027.

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

It can be written as a sum of positive squares in 2 ways, for example, as 143029188864 + 577358345281 = 378192^2 + 759841^2 .

It is a cyclic number.

It is not a de Polignac number, because 720387534145 - 2⁹ = 720387533633 is a prime.

It is a super-3 number, since 3×720387534145³ (a number of 37 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72038753410 + ... + 72038753419.

It is an arithmetic number, because the mean of its divisors is an integer number (216116260245).

Almost surely, 2^720387534145 is an apocalyptic number.

It is an amenable number.

720387534145 is a deficient number, since it is larger than the sum of its proper divisors (144077506835).

720387534145 is a wasteful number, since it uses less digits than its factorization.

720387534145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144077506834.

The product of its (nonzero) digits is 2822400, while the sum is 49.

The spelling of 720387534145 in words is "seven hundred twenty billion, three hundred eighty-seven million, five hundred thirty-four thousand, one hundred forty-five".