7720505660523 has 16 divisors (see below), whose sum is σ = 10473703549056. Its totient is φ = 5057538921600.

The previous prime is 7720505660503. The next prime is 7720505660561. The reversal of 7720505660523 is 3250665050277.

It is a happy number.

It is not a de Polignac number, because 7720505660523 - 2²⁸ = 7720237225067 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7720505660503) 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, 47812761 + ... + 47973962.

It is an arithmetic number, because the mean of its divisors is an integer number (654606471816).

Almost surely, 2^{7720505660523} is an apocalyptic number.

7720505660523 is a deficient number, since it is larger than the sum of its proper divisors (2753197888533).

7720505660523 is a wasteful number, since it uses less digits than its factorization.

7720505660523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95787194.

The product of its (nonzero) digits is 2646000, while the sum is 48.

The spelling of 7720505660523 in words is "seven trillion, seven hundred twenty billion, five hundred five million, six hundred sixty thousand, five hundred twenty-three".