135911522451 has 4 divisors (see below), whose sum is σ = 181215363272. Its totient is φ = 90607681632.

The previous prime is 135911522431. The next prime is 135911522473. The reversal of 135911522451 is 154225119531.

It is a happy number.

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

It is not a de Polignac number, because 135911522451 - 2⁶ = 135911522387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135911522431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22651920406 + ... + 22651920411.

It is an arithmetic number, because the mean of its divisors is an integer number (45303840818).

Almost surely, 2^135911522451 is an apocalyptic number.

135911522451 is a deficient number, since it is larger than the sum of its proper divisors (45303840821).

135911522451 is an equidigital number, since it uses as much as digits as its factorization.

135911522451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45303840820.

The product of its digits is 54000, while the sum is 39.

The spelling of 135911522451 in words is "one hundred thirty-five billion, nine hundred eleven million, five hundred twenty-two thousand, four hundred fifty-one".