134878621608 has 192 divisors, whose sum is σ = 408931286400. Its totient is φ = 41521455360.

The previous prime is 134878621573. The next prime is 134878621667. The reversal of 134878621608 is 806126878431.

134878621608 is a `hidden beast` number, since 1 + 3 + 4 + 8 + 7 + 8 + 6 + 21 + 608 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1244638 + ... + 1348658.

It is an arithmetic number, because the mean of its divisors is an integer number (2129850450).

Almost surely, 2^134878621608 is an apocalyptic number.

134878621608 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 134878621608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (204465643200).

134878621608 is an abundant number, since it is smaller than the sum of its proper divisors (274052664792).

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

134878621608 is a wasteful number, since it uses less digits than its factorization.

134878621608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104094 (or 104078 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 54.

The spelling of 134878621608 in words is "one hundred thirty-four billion, eight hundred seventy-eight million, six hundred twenty-one thousand, six hundred eight".