77423573501 has 16 divisors (see below), whose sum is σ = 82607059440. Its totient is φ = 72310394880.

The previous prime is 77423573489. The next prime is 77423573527. The reversal of 77423573501 is 10537532477.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 2388667876 + 75034905625 = 48874^2 + 273925^2 .

It is not a de Polignac number, because 77423573501 - 2¹⁰ = 77423572477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77423513501) 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, 9146411 + ... + 9154871.

It is an arithmetic number, because the mean of its divisors is an integer number (5162941215).

Almost surely, 2^77423573501 is an apocalyptic number.

It is an amenable number.

77423573501 is a deficient number, since it is larger than the sum of its proper divisors (5183485939).

77423573501 is a wasteful number, since it uses less digits than its factorization.

77423573501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12544.

The product of its (nonzero) digits is 617400, while the sum is 44.

The spelling of 77423573501 in words is "seventy-seven billion, four hundred twenty-three million, five hundred seventy-three thousand, five hundred one".