134905394988 has 576 divisors, whose sum is σ = 458082293760. Its totient is φ = 32495468544.

The previous prime is 134905394971. The next prime is 134905395019. The reversal of 134905394988 is 889493509431.

134905394988 is a `hidden beast` number, since 1 + 3 + 4 + 9 + 0 + 539 + 4 + 98 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 233804556 + ... + 233805132.

It is an arithmetic number, because the mean of its divisors is an integer number (795281760).

Almost surely, 2^134905394988 is an apocalyptic number.

134905394988 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 134905394988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (229041146880).

134905394988 is an abundant number, since it is smaller than the sum of its proper divisors (323176898772).

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

134905394988 is a wasteful number, since it uses less digits than its factorization.

134905394988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 766 (or 761 counting only the distinct ones).

The product of its (nonzero) digits is 33592320, while the sum is 63.

The spelling of 134905394988 in words is "one hundred thirty-four billion, nine hundred five million, three hundred ninety-four thousand, nine hundred eighty-eight".