215147611664 has 10 divisors (see below), whose sum is σ = 416848497630. Its totient is φ = 107573805824.

The previous prime is 215147611663. The next prime is 215147611667. The reversal of 215147611664 is 466116741512.

It can be written as a sum of positive squares in only one way, i.e., 130315224064 + 84832387600 = 360992^2 + 291260^2 .

It is not an unprimeable number, because it can be changed into a prime (215147611663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6723362849 + ... + 6723362880.

It is an arithmetic number, because the mean of its divisors is an integer number (41684849763).

Almost surely, 2^215147611664 is an apocalyptic number.

It is an amenable number.

215147611664 is a deficient number, since it is larger than the sum of its proper divisors (201700885966).

215147611664 is a wasteful number, since it uses less digits than its factorization.

215147611664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13446725737 (or 13446725731 counting only the distinct ones).

The product of its digits is 241920, while the sum is 44.

The spelling of 215147611664 in words is "two hundred fifteen billion, one hundred forty-seven million, six hundred eleven thousand, six hundred sixty-four".