215064645534 has 64 divisors (see below), whose sum is σ = 516801254400. Its totient is φ = 66035689344.

The previous prime is 215064645529. The next prime is 215064645539. The reversal of 215064645534 is 435546460512.

215064645534 is a `hidden beast` number, since 2 + 1 + 50 + 6 + 4 + 64 + 5 + 534 = 666.

215064645534 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (215064645529) and next prime (215064645539).

It is a super-2 number, since 2×215064645534² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 215064645534.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215064645539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2449144 + ... + 2535435.

It is an arithmetic number, because the mean of its divisors is an integer number (8075019600).

Almost surely, 2^215064645534 is an apocalyptic number.

215064645534 is an abundant number, since it is smaller than the sum of its proper divisors (301736608866).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

215064645534 is a wasteful number, since it uses less digits than its factorization.

215064645534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4984654 (or 4984648 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 45.

The spelling of 215064645534 in words is "two hundred fifteen billion, sixty-four million, six hundred forty-five thousand, five hundred thirty-four".