78377341569 has 16 divisors (see below), whose sum is σ = 115461251712. Its totient is φ = 47039767808.

The previous prime is 78377341531. The next prime is 78377341577. The reversal of 78377341569 is 96514377387.

It is not a de Polignac number, because 78377341569 - 2²¹ = 78375244417 is a prime.

It is a super-2 number, since 2×78377341569² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (78377341519) 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, 33407754 + ... + 33410099.

It is an arithmetic number, because the mean of its divisors is an integer number (7216328232).

Almost surely, 2^78377341569 is an apocalyptic number.

It is an amenable number.

78377341569 is a deficient number, since it is larger than the sum of its proper divisors (37083910143).

78377341569 is a wasteful number, since it uses less digits than its factorization.

78377341569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66817896.

The product of its digits is 26671680, while the sum is 60.

The spelling of 78377341569 in words is "seventy-eight billion, three hundred seventy-seven million, three hundred forty-one thousand, five hundred sixty-nine".