212640513468634 has 16 divisors (see below), whose sum is σ = 329261419664640. Its totient is φ = 102886948421280.

The previous prime is 212640513468631. The next prime is 212640513468701. The reversal of 212640513468634 is 436864315046212.

It is not an unprimeable number, because it can be changed into a prime (212640513468631) 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, 58601304 + ... + 62124019.

It is an arithmetic number, because the mean of its divisors is an integer number (20578838729040).

Almost surely, 2^{212640513468634} is an apocalyptic number.

212640513468634 is a deficient number, since it is larger than the sum of its proper divisors (116620906196006).

212640513468634 is a wasteful number, since it uses less digits than its factorization.

212640513468634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120753765.

The product of its (nonzero) digits is 19906560, while the sum is 55.

The spelling of 212640513468634 in words is "two hundred twelve trillion, six hundred forty billion, five hundred thirteen million, four hundred sixty-eight thousand, six hundred thirty-four".