78376342784 has 18 divisors (see below), whose sum is σ = 156446528490. Its totient is φ = 39188171264.

The previous prime is 78376342777. The next prime is 78376342823. The reversal of 78376342784 is 48724367387.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 73896985600 + 4479357184 = 271840^2 + 66928^2 .

It is a super-2 number, since 2×78376342784² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153078539 + ... + 153079050.

It is an arithmetic number, because the mean of its divisors is an integer number (8691473805).

Almost surely, 2^78376342784 is an apocalyptic number.

It is an amenable number.

78376342784 is a deficient number, since it is larger than the sum of its proper divisors (78070185706).

78376342784 is an equidigital number, since it uses as much as digits as its factorization.

78376342784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306157605 (or 306157591 counting only the distinct ones).

The product of its digits is 37933056, while the sum is 59.

The spelling of 78376342784 in words is "seventy-eight billion, three hundred seventy-six million, three hundred forty-two thousand, seven hundred eighty-four".