212558260640 has 72 divisors (see below), whose sum is σ = 551970814500. Its totient is φ = 77293905920.

The previous prime is 212558260639. The next prime is 212558260643. The reversal of 212558260640 is 46062855212.

It can be written as a sum of positive squares in 2 ways, for example, as 208311913744 + 4246346896 = 456412^2 + 65164^2 .

It is not an unprimeable number, because it can be changed into a prime (212558260643) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5470265 + ... + 5508984.

Almost surely, 2^212558260640 is an apocalyptic number.

212558260640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212558260640 is an abundant number, since it is smaller than the sum of its proper divisors (339412553860).

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

212558260640 is a wasteful number, since it uses less digits than its factorization.

212558260640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10979286 (or 10979267 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 41.

The spelling of 212558260640 in words is "two hundred twelve billion, five hundred fifty-eight million, two hundred sixty thousand, six hundred forty".