720109125977 has 4 divisors (see below), whose sum is σ = 720223236096. Its totient is φ = 719995015860.

The previous prime is 720109125971. The next prime is 720109125991. The reversal of 720109125977 is 779521901027.

720109125977 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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: 779521901027 = 304597 ⋅2559191.

It is a cyclic number.

It is not a de Polignac number, because 720109125977 - 2²⁴ = 720092348761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (720109125971) 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, 57045593 + ... + 57058214.

It is an arithmetic number, because the mean of its divisors is an integer number (180055809024).

Almost surely, 2^720109125977 is an apocalyptic number.

It is an amenable number.

720109125977 is a deficient number, since it is larger than the sum of its proper divisors (114110119).

720109125977 is a wasteful number, since it uses less digits than its factorization.

720109125977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114110118.

The product of its (nonzero) digits is 555660, while the sum is 50.

The spelling of 720109125977 in words is "seven hundred twenty billion, one hundred nine million, one hundred twenty-five thousand, nine hundred seventy-seven".