78329348638 has 16 divisors (see below), whose sum is σ = 124510070160. Its totient is φ = 36891870400.

The previous prime is 78329348633. The next prime is 78329348641. The reversal of 78329348638 is 83684392387.

It is a super-2 number, since 2×78329348638² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78329348633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16467208 + ... + 16471963.

It is an arithmetic number, because the mean of its divisors is an integer number (7781879385).

Almost surely, 2^78329348638 is an apocalyptic number.

78329348638 is a deficient number, since it is larger than the sum of its proper divisors (46180721522).

78329348638 is a wasteful number, since it uses less digits than its factorization.

78329348638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32939243.

The product of its digits is 41803776, while the sum is 61.

The spelling of 78329348638 in words is "seventy-eight billion, three hundred twenty-nine million, three hundred forty-eight thousand, six hundred thirty-eight".