215564474704 has 10 divisors (see below), whose sum is σ = 417656169770. Its totient is φ = 107782237344.

The previous prime is 215564474693. The next prime is 215564474729. The reversal of 215564474704 is 407474465512.

It can be written as a sum of positive squares in only one way, i.e., 208849000000 + 6715474704 = 457000^2 + 81948^2 .

It is a super-2 number, since 2×215564474704² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6736389819 + ... + 6736389850.

It is an arithmetic number, because the mean of its divisors is an integer number (41765616977).

Almost surely, 2^215564474704 is an apocalyptic number.

It is an amenable number.

215564474704 is a deficient number, since it is larger than the sum of its proper divisors (202091695066).

215564474704 is a wasteful number, since it uses less digits than its factorization.

215564474704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13472779677 (or 13472779671 counting only the distinct ones).

The product of its (nonzero) digits is 3763200, while the sum is 49.

The spelling of 215564474704 in words is "two hundred fifteen billion, five hundred sixty-four million, four hundred seventy-four thousand, seven hundred four".