78657557058234 has 192 divisors, whose sum is σ = 212851209811968. Its totient is φ = 20394638409600.

The previous prime is 78657557058203. The next prime is 78657557058263. The reversal of 78657557058234 is 43285075575687.

It is a happy number.

78657557058234 is a `hidden beast` number, since 7 + 8 + 6 + 5 + 7 + 5 + 5 + 7 + 0 + 582 + 34 = 666.

It is a super-2 number, since 2×78657557058234² (a number of 29 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1849308832 + ... + 1849351364.

It is an arithmetic number, because the mean of its divisors is an integer number (1108600051104).

Almost surely, 2^{78657557058234} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78657557058234, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106425604905984).

78657557058234 is an abundant number, since it is smaller than the sum of its proper divisors (134193652753734).

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

78657557058234 is a wasteful number, since it uses less digits than its factorization.

78657557058234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44873 (or 44870 counting only the distinct ones).

The product of its (nonzero) digits is 1975680000, while the sum is 72.

The spelling of 78657557058234 in words is "seventy-eight trillion, six hundred fifty-seven billion, five hundred fifty-seven million, fifty-eight thousand, two hundred thirty-four".