135621661502 has 8 divisors (see below), whose sum is σ = 207760843296. Its totient is φ = 66368047072.

The previous prime is 135621661499. The next prime is 135621661577. The reversal of 135621661502 is 205166126531.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 721391723 + ... + 721391910.

It is an arithmetic number, because the mean of its divisors is an integer number (25970105412).

Almost surely, 2^135621661502 is an apocalyptic number.

135621661502 is a deficient number, since it is larger than the sum of its proper divisors (72139181794).

135621661502 is a wasteful number, since it uses less digits than its factorization.

135621661502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1442783682.

The product of its (nonzero) digits is 64800, while the sum is 38.

The spelling of 135621661502 in words is "one hundred thirty-five billion, six hundred twenty-one million, six hundred sixty-one thousand, five hundred two".