135804737621 has 8 divisors (see below), whose sum is σ = 155357734080. Its totient is φ = 116289821088.

The previous prime is 135804737617. The next prime is 135804737633. The reversal of 135804737621 is 126737408531.

It is a happy number.

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

It is not a de Polignac number, because 135804737621 - 2² = 135804737617 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 (135804737671) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 9512336 + ... + 9526601.

It is an arithmetic number, because the mean of its divisors is an integer number (19419716760).

Almost surely, 2^135804737621 is an apocalyptic number.

It is an amenable number.

135804737621 is a deficient number, since it is larger than the sum of its proper divisors (19552996459).

135804737621 is a wasteful number, since it uses less digits than its factorization.

135804737621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19039963.

The product of its (nonzero) digits is 846720, while the sum is 47.

The spelling of 135804737621 in words is "one hundred thirty-five billion, eight hundred four million, seven hundred thirty-seven thousand, six hundred twenty-one".