78328156543 has 12 divisors (see below), whose sum is σ = 98125383720. Its totient is φ = 61973925552.

The previous prime is 78328156499. The next prime is 78328156547. The reversal of 78328156543 is 34565182387.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-78328156543 is a prime.

It is a super-2 number, since 2×78328156543² (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 (78328156547) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61481433 + ... + 61482706.

It is an arithmetic number, because the mean of its divisors is an integer number (8177115310).

Almost surely, 2^78328156543 is an apocalyptic number.

78328156543 is a deficient number, since it is larger than the sum of its proper divisors (19797227177).

78328156543 is a wasteful number, since it uses less digits than its factorization.

78328156543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122964166 (or 122964159 counting only the distinct ones).

The product of its digits is 4838400, while the sum is 52.

The spelling of 78328156543 in words is "seventy-eight billion, three hundred twenty-eight million, one hundred fifty-six thousand, five hundred forty-three".