212640791308 has 24 divisors (see below), whose sum is σ = 423600629760. Its totient is φ = 92452517520.

The previous prime is 212640791303. The next prime is 212640791309. The reversal of 212640791308 is 803197046212.

It is a super-2 number, since 2×212640791308² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (212640791303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105058668 + ... + 105060691.

It is an arithmetic number, because the mean of its divisors is an integer number (17650026240).

Almost surely, 2^212640791308 is an apocalyptic number.

It is an amenable number.

212640791308 is a deficient number, since it is larger than the sum of its proper divisors (210959838452).

212640791308 is a wasteful number, since it uses less digits than its factorization.

212640791308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210119397 (or 210119395 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 43.

The spelling of 212640791308 in words is "two hundred twelve billion, six hundred forty million, seven hundred ninety-one thousand, three hundred eight".