2129807942605 has 32 divisors (see below), whose sum is σ = 2969652930048. Its totient is φ = 1436067360000.

The previous prime is 2129807942593. The next prime is 2129807942609. The reversal of 2129807942605 is 5062497089212.

It is a happy number.

It is not a de Polignac number, because 2129807942605 - 2¹⁵ = 2129807909837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2129807942609) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7053480 + ... + 7349230.

It is an arithmetic number, because the mean of its divisors is an integer number (92801654064).

Almost surely, 2^{2129807942605} is an apocalyptic number.

It is an amenable number.

2129807942605 is a deficient number, since it is larger than the sum of its proper divisors (839844987443).

2129807942605 is a wasteful number, since it uses less digits than its factorization.

2129807942605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299197.

The product of its (nonzero) digits is 4354560, while the sum is 55.

The spelling of 2129807942605 in words is "two trillion, one hundred twenty-nine billion, eight hundred seven million, nine hundred forty-two thousand, six hundred five".