212604139990 has 32 divisors (see below), whose sum is σ = 417567985920. Its totient is φ = 77293788000.

The previous prime is 212604139981. The next prime is 212604140009. The reversal of 212604139990 is 99931406212.

It is a self number, because there is not a number n which added to its sum of digits gives 212604139990.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 303831 + ... + 719389.

It is an arithmetic number, because the mean of its divisors is an integer number (13048999560).

Almost surely, 2^212604139990 is an apocalyptic number.

212604139990 is a deficient number, since it is larger than the sum of its proper divisors (204963845930).

212604139990 is a wasteful number, since it uses less digits than its factorization.

212604139990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420228.

The product of its (nonzero) digits is 209952, while the sum is 46.

The spelling of 212604139990 in words is "two hundred twelve billion, six hundred four million, one hundred thirty-nine thousand, nine hundred ninety".