77571474956089 has 3 divisors (see below), whose sum is σ = 77571483763557. Its totient is φ = 77571466148622.

The previous prime is 77571474956083. The next prime is 77571474956119. The reversal of 77571474956089 is 98065947417577.

The square root of 77571474956089 is 8807467.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 77571474956089 - 2¹⁵ = 77571474923321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77571474956083) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4403734 + ... + 13211200.

It is an arithmetic number, because the mean of its divisors is an integer number (25857161254519).

Almost surely, 2^{77571474956089} is an apocalyptic number.

77571474956089 is the 8807467-th square number.

77571474956089 is the 4403734-th centered octagonal number.

It is an amenable number.

77571474956089 is a deficient number, since it is larger than the sum of its proper divisors (8807468).

77571474956089 is an frugal number, since it uses more digits than its factorization.

77571474956089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17614934 (or 8807467 counting only the distinct ones).

The product of its (nonzero) digits is 3734035200, while the sum is 79.

The spelling of 77571474956089 in words is "seventy-seven trillion, five hundred seventy-one billion, four hundred seventy-four million, nine hundred fifty-six thousand, eighty-nine".