78787535445577 has 4 divisors (see below), whose sum is σ = 90042897652096. Its totient is φ = 67532173239060.

The previous prime is 78787535445547. The next prime is 78787535445607. The reversal of 78787535445577 is 77554453578787.

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 an interprime number because it is at equal distance from previous prime (78787535445547) and next prime (78787535445607).

It is a cyclic number.

It is not a de Polignac number, because 78787535445577 - 2²⁷ = 78787401227849 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 78787535445577.

It is not an unprimeable number, because it can be changed into a prime (78787535445547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5627681103249 + ... + 5627681103262.

It is an arithmetic number, because the mean of its divisors is an integer number (22510724413024).

Almost surely, 2^{78787535445577} is an apocalyptic number.

It is an amenable number.

78787535445577 is a deficient number, since it is larger than the sum of its proper divisors (11255362206519).

78787535445577 is a wasteful number, since it uses less digits than its factorization.

78787535445577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11255362206518.

The product of its digits is 32269440000, while the sum is 82.

The spelling of 78787535445577 in words is "seventy-eight trillion, seven hundred eighty-seven billion, five hundred thirty-five million, four hundred forty-five thousand, five hundred seventy-seven".