212504361664 has 56 divisors (see below), whose sum is σ = 483131762208. Its totient is φ = 90846105600.

The previous prime is 212504361637. The next prime is 212504361677. The reversal of 212504361664 is 466163405212.

It is a tau number, because it is divible by the number of its divisors (56).

It is a super-2 number, since 2×212504361664² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 411799 + ... + 771094.

Almost surely, 2^212504361664 is an apocalyptic number.

It is an amenable number.

212504361664 is an abundant number, since it is smaller than the sum of its proper divisors (270627400544).

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

212504361664 is a wasteful number, since it uses less digits than its factorization.

212504361664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1183313 (or 1183303 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 40.

Adding to 212504361664 its reverse (466163405212), we get a palindrome (678667766876).

It can be divided in two parts, 21250436 and 1664, that added together give a square (21252100 = 4610²).

The spelling of 212504361664 in words is "two hundred twelve billion, five hundred four million, three hundred sixty-one thousand, six hundred sixty-four".