136405120621544 has 32 divisors (see below), whose sum is σ = 266907987717120. Its totient is φ = 65230288428096.

The previous prime is 136405120621519. The next prime is 136405120621591. The reversal of 136405120621544 is 445126021504631.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 136405120621495 and 136405120621504.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37716104 + ... + 41174199.

It is an arithmetic number, because the mean of its divisors is an integer number (8340874616160).

Almost surely, 2^{136405120621544} is an apocalyptic number.

It is an amenable number.

136405120621544 is a deficient number, since it is larger than the sum of its proper divisors (130502867095576).

136405120621544 is a wasteful number, since it uses less digits than its factorization.

136405120621544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78899729 (or 78899725 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 44.

The spelling of 136405120621544 in words is "one hundred thirty-six trillion, four hundred five billion, one hundred twenty million, six hundred twenty-one thousand, five hundred forty-four".