655620640511 has 8 divisors (see below), whose sum is σ = 662572354080. Its totient is φ = 648680205312.

The previous prime is 655620640501. The next prime is 655620640583. The reversal of 655620640511 is 115046026556.

655620640511 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 655620640511 - 2¹⁸ = 655620378367 is a prime.

It is a super-2 number, since 2×655620640511² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655620640501) 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, 2702690 + ... + 2935263.

It is an arithmetic number, because the mean of its divisors is an integer number (82821544260).

Almost surely, 2^655620640511 is an apocalyptic number.

655620640511 is a deficient number, since it is larger than the sum of its proper divisors (6951713569).

655620640511 is a wasteful number, since it uses less digits than its factorization.

655620640511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5639185.

The product of its (nonzero) digits is 216000, while the sum is 41.

The spelling of 655620640511 in words is "six hundred fifty-five billion, six hundred twenty million, six hundred forty thousand, five hundred eleven".