78134546966784 has 576 divisors, whose sum is σ = 263038052229120. Its totient is φ = 20001073397760.

The previous prime is 78134546966767. The next prime is 78134546966821. The reversal of 78134546966784 is 48766964543187.

It is a super-2 number, since 2×78134546966784² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1370921392 + ... + 1370978384.

It is an arithmetic number, because the mean of its divisors is an integer number (456663285120).

Almost surely, 2^{78134546966784} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78134546966784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131519026114560).

78134546966784 is an abundant number, since it is smaller than the sum of its proper divisors (184903505262336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78134546966784 is a wasteful number, since it uses less digits than its factorization.

78134546966784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57366 (or 57352 counting only the distinct ones).

The product of its digits is 5852528640, while the sum is 78.

The spelling of 78134546966784 in words is "seventy-eight trillion, one hundred thirty-four billion, five hundred forty-six million, nine hundred sixty-six thousand, seven hundred eighty-four".