77004440285509 has 4 divisors (see below), whose sum is σ = 84004843947840. Its totient is φ = 70004036623180.

The previous prime is 77004440285429. The next prime is 77004440285537. The reversal of 77004440285509 is 90558204440077.

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.

It is a de Polignac number, because none of the positive numbers 2^k-77004440285509 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 77004440285509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77004440285569) 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, 3500201831149 + ... + 3500201831170.

It is an arithmetic number, because the mean of its divisors is an integer number (21001210986960).

Almost surely, 2^{77004440285509} is an apocalyptic number.

It is an amenable number.

77004440285509 is a deficient number, since it is larger than the sum of its proper divisors (7000403662331).

77004440285509 is a wasteful number, since it uses less digits than its factorization.

77004440285509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7000403662330.

The product of its (nonzero) digits is 11289600, while the sum is 55.

The spelling of 77004440285509 in words is "seventy-seven trillion, four billion, four hundred forty million, two hundred eighty-five thousand, five hundred nine".