136446506551 has 4 divisors (see below), whose sum is σ = 138173677600. Its totient is φ = 134719335504.

The previous prime is 136446506549. The next prime is 136446506569. The reversal of 136446506551 is 155605644631.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 136446506551 - 2¹ = 136446506549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136446506531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 863585406 + ... + 863585563.

It is an arithmetic number, because the mean of its divisors is an integer number (34543419400).

Almost surely, 2^136446506551 is an apocalyptic number.

136446506551 is a deficient number, since it is larger than the sum of its proper divisors (1727171049).

136446506551 is an equidigital number, since it uses as much as digits as its factorization.

136446506551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1727171048.

The product of its (nonzero) digits is 1296000, while the sum is 46.

The spelling of 136446506551 in words is "one hundred thirty-six billion, four hundred forty-six million, five hundred six thousand, five hundred fifty-one".