215361136655 has 16 divisors (see below), whose sum is σ = 295742614080. Its totient is φ = 147481108992.

The previous prime is 215361136619. The next prime is 215361136681. The reversal of 215361136655 is 556631163512.

It is a happy number.

It is not a de Polignac number, because 215361136655 - 2¹² = 215361132559 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4037690 + ... + 4090679.

It is an arithmetic number, because the mean of its divisors is an integer number (18483913380).

Almost surely, 2^215361136655 is an apocalyptic number.

215361136655 is a deficient number, since it is larger than the sum of its proper divisors (80381477425).

215361136655 is an equidigital number, since it uses as much as digits as its factorization.

215361136655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8129138.

The product of its digits is 486000, while the sum is 44.

The spelling of 215361136655 in words is "two hundred fifteen billion, three hundred sixty-one million, one hundred thirty-six thousand, six hundred fifty-five".