136404635186888 has 8 divisors (see below), whose sum is σ = 255758690975430. Its totient is φ = 68202317593440.

The previous prime is 136404635186881. The next prime is 136404635186893. The reversal of 136404635186888 is 888681536404631.

It can be written as a sum of positive squares in only one way, i.e., 123147448341124 + 13257186845764 = 11097182^2 + 3641042^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (136404635186881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8525289699173 + ... + 8525289699188.

Almost surely, 2^{136404635186888} is an apocalyptic number.

It is an amenable number.

136404635186888 is a deficient number, since it is larger than the sum of its proper divisors (119354055788542).

136404635186888 is a wasteful number, since it uses less digits than its factorization.

136404635186888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17050579398367 (or 17050579398363 counting only the distinct ones).

The product of its (nonzero) digits is 637009920, while the sum is 71.

The spelling of 136404635186888 in words is "one hundred thirty-six trillion, four hundred four billion, six hundred thirty-five million, one hundred eighty-six thousand, eight hundred eighty-eight".