655712157211 has 32 divisors (see below), whose sum is σ = 702190944000. Its totient is φ = 610551779328.

The previous prime is 655712157197. The next prime is 655712157223. The reversal of 655712157211 is 112751217556.

It is a cyclic number.

It is not a de Polignac number, because 655712157211 - 2²¹ = 655710060059 is a prime.

It is a super-2 number, since 2×655712157211² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (655712157241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 110145211 + ... + 110151163.

It is an arithmetic number, because the mean of its divisors is an integer number (21943467000).

Almost surely, 2^655712157211 is an apocalyptic number.

655712157211 is a deficient number, since it is larger than the sum of its proper divisors (46478786789).

655712157211 is a wasteful number, since it uses less digits than its factorization.

655712157211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6523.

The product of its digits is 147000, while the sum is 43.

The spelling of 655712157211 in words is "six hundred fifty-five billion, seven hundred twelve million, one hundred fifty-seven thousand, two hundred eleven".