215545164655 has 4 divisors (see below), whose sum is σ = 258654197592. Its totient is φ = 172436131720.

The previous prime is 215545164613. The next prime is 215545164671. The reversal of 215545164655 is 556461545512.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 215545164655 - 2¹⁵ = 215545131887 is a prime.

It is a super-2 number, since 2×215545164655² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 215545164599 and 215545164608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21554516461 + ... + 21554516470.

It is an arithmetic number, because the mean of its divisors is an integer number (64663549398).

Almost surely, 2^215545164655 is an apocalyptic number.

215545164655 is a deficient number, since it is larger than the sum of its proper divisors (43109032937).

215545164655 is an equidigital number, since it uses as much as digits as its factorization.

215545164655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43109032936.

The product of its digits is 3600000, while the sum is 49.

The spelling of 215545164655 in words is "two hundred fifteen billion, five hundred forty-five million, one hundred sixty-four thousand, six hundred fifty-five".