720050685409 has 4 divisors (see below), whose sum is σ = 785509838640. Its totient is φ = 654591532180.

The previous prime is 720050685349. The next prime is 720050685437. The reversal of 720050685409 is 904586050027.

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, and also an emirpimes, since its reverse is a distinct semiprime: 904586050027 = 11 ⋅82235095457.

It is a cyclic number.

It is not a de Polignac number, because 720050685409 - 2²⁷ = 719916467681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (720050683409) 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, 32729576599 + ... + 32729576620.

It is an arithmetic number, because the mean of its divisors is an integer number (196377459660).

Almost surely, 2^720050685409 is an apocalyptic number.

It is an amenable number.

720050685409 is a deficient number, since it is larger than the sum of its proper divisors (65459153231).

720050685409 is a wasteful number, since it uses less digits than its factorization.

720050685409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65459153230.

The product of its (nonzero) digits is 604800, while the sum is 46.

The spelling of 720050685409 in words is "seven hundred twenty billion, fifty million, six hundred eighty-five thousand, four hundred nine".