135861664968 has 48 divisors (see below), whose sum is σ = 370162054080. Its totient is φ = 45016036704.

The previous prime is 135861664963. The next prime is 135861664997. The reversal of 135861664968 is 869466168531.

135861664968 is a `hidden beast` number, since 1 + 3 + 5 + 8 + 616 + 6 + 4 + 9 + 6 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (135861664963) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5637580 + ... + 5661627.

It is an arithmetic number, because the mean of its divisors is an integer number (7711709460).

Almost surely, 2^135861664968 is an apocalyptic number.

135861664968 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

135861664968 is an abundant number, since it is smaller than the sum of its proper divisors (234300389112).

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

135861664968 is a wasteful number, since it uses less digits than its factorization.

135861664968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11299386 (or 11299379 counting only the distinct ones).

The product of its digits is 44789760, while the sum is 63.

The spelling of 135861664968 in words is "one hundred thirty-five billion, eight hundred sixty-one million, six hundred sixty-four thousand, nine hundred sixty-eight".