136445428021 has 8 divisors (see below), whose sum is σ = 155985950720. Its totient is φ = 116916985008.

The previous prime is 136445427971. The next prime is 136445428037. The reversal of 136445428021 is 120824544631.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136445428021 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 (136445428621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2995701 + ... + 3040906.

It is an arithmetic number, because the mean of its divisors is an integer number (19498243840).

Almost surely, 2^136445428021 is an apocalyptic number.

It is an amenable number.

136445428021 is a deficient number, since it is larger than the sum of its proper divisors (19540522699).

136445428021 is an equidigital number, since it uses as much as digits as its factorization.

136445428021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6039843.

The product of its (nonzero) digits is 184320, while the sum is 40.

The spelling of 136445428021 in words is "one hundred thirty-six billion, four hundred forty-five million, four hundred twenty-eight thousand, twenty-one".