255136075621 has 8 divisors (see below), whose sum is σ = 291605984384. Its totient is φ = 218671641360.

The previous prime is 255136075609. The next prime is 255136075673. The reversal of 255136075621 is 126570631552.

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

It is a cyclic number.

It is not a de Polignac number, because 255136075621 - 2¹³ = 255136067429 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 (255136075121) 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, 1268265 + ... + 1455598.

It is an arithmetic number, because the mean of its divisors is an integer number (36450748048).

Almost surely, 2^255136075621 is an apocalyptic number.

It is an amenable number.

255136075621 is a deficient number, since it is larger than the sum of its proper divisors (36469908763).

255136075621 is a wasteful number, since it uses less digits than its factorization.

255136075621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2737251.

The product of its (nonzero) digits is 378000, while the sum is 43.

The spelling of 255136075621 in words is "two hundred fifty-five billion, one hundred thirty-six million, seventy-five thousand, six hundred twenty-one".