77543870089 has 15 divisors (see below), whose sum is σ = 90478386573. Its totient is φ = 66454478748.

The previous prime is 77543870087. The next prime is 77543870113. The reversal of 77543870089 is 98007834577.

The square root of 77543870089 is 278467.

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

It is not a de Polignac number, because 77543870089 - 2¹ = 77543870087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77543870087) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 13642042 + ... + 13647724.

Almost surely, 2^77543870089 is an apocalyptic number.

77543870089 is the 278467-th square number.

77543870089 is the 139234-th centered octagonal number.

It is an amenable number.

77543870089 is a deficient number, since it is larger than the sum of its proper divisors (12934516484).

77543870089 is an frugal number, since it uses more digits than its factorization.

77543870089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11394 (or 5690 counting only the distinct ones).

The product of its (nonzero) digits is 11854080, while the sum is 58.

The spelling of 77543870089 in words is "seventy-seven billion, five hundred forty-three million, eight hundred seventy thousand, eighty-nine".