136504781064 has 256 divisors, whose sum is σ = 407871072000. Its totient is φ = 42216007680.

The previous prime is 136504781053. The next prime is 136504781107. The reversal of 136504781064 is 460187405631.

136504781064 is a `hidden beast` number, since 1 + 3 + 6 + 504 + 7 + 81 + 0 + 64 = 666.

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, 17203242 + ... + 17211174.

It is an arithmetic number, because the mean of its divisors is an integer number (1593246375).

Almost surely, 2^136504781064 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 136504781064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (203935536000).

136504781064 is an abundant number, since it is smaller than the sum of its proper divisors (271366290936).

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

136504781064 is a wasteful number, since it uses less digits than its factorization.

136504781064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8085 (or 8075 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 136504781064 in words is "one hundred thirty-six billion, five hundred four million, seven hundred eighty-one thousand, sixty-four".