655438191011 has 8 divisors (see below), whose sum is σ = 674707378464. Its totient is φ = 636250826880.

The previous prime is 655438190993. The next prime is 655438191127. The reversal of 655438191011 is 110191834556.

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 655438191011 - 2¹⁸ = 655437928867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (655438199011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20439575 + ... + 20471616.

It is an arithmetic number, because the mean of its divisors is an integer number (84338422308).

Almost surely, 2^655438191011 is an apocalyptic number.

655438191011 is a deficient number, since it is larger than the sum of its proper divisors (19269187453).

655438191011 is a wasteful number, since it uses less digits than its factorization.

655438191011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40911661.

The product of its (nonzero) digits is 129600, while the sum is 44.

The spelling of 655438191011 in words is "six hundred fifty-five billion, four hundred thirty-eight million, one hundred ninety-one thousand, eleven".