136858619521 has 16 divisors (see below), whose sum is σ = 152121412800. Its totient is φ = 122336203968.

The previous prime is 136858619519. The next prime is 136858619563. The reversal of 136858619521 is 125916858631.

It is a cyclic number.

It is not a de Polignac number, because 136858619521 - 2¹ = 136858619519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136858619501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1280206 + ... + 1382983.

It is an arithmetic number, because the mean of its divisors is an integer number (9507588300).

Almost surely, 2^136858619521 is an apocalyptic number.

It is an amenable number.

136858619521 is a deficient number, since it is larger than the sum of its proper divisors (15262793279).

136858619521 is a wasteful number, since it uses less digits than its factorization.

136858619521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2663328.

The product of its digits is 3110400, while the sum is 55.

The spelling of 136858619521 in words is "one hundred thirty-six billion, eight hundred fifty-eight million, six hundred nineteen thousand, five hundred twenty-one".