78377077387 has 16 divisors (see below), whose sum is σ = 90091782144. Its totient is φ = 66792060000.

The previous prime is 78377077357. The next prime is 78377077399.

It is a happy number.

78377077387 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 78377077387 - 2³⁵ = 44017339019 is a prime.

It is a super-2 number, since 2×78377077387² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78377077357) 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 15 ways as a sum of consecutive naturals, for example, 8751762 + ... + 8760712.

It is an arithmetic number, because the mean of its divisors is an integer number (5630736384).

Almost surely, 2^78377077387 is an apocalyptic number.

78377077387 is a deficient number, since it is larger than the sum of its proper divisors (11714704757).

78377077387 is a wasteful number, since it uses less digits than its factorization.

78377077387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16050.

The product of its (nonzero) digits is 67765824, while the sum is 64.

The spelling of 78377077387 in words is "seventy-eight billion, three hundred seventy-seven million, seventy-seven thousand, three hundred eighty-seven".