2100646996405 has 16 divisors (see below), whose sum is σ = 2545192507968. Its totient is φ = 1664292448000.

The previous prime is 2100646996397. The next prime is 2100646996423. The reversal of 2100646996405 is 5046996460012.

It is not a de Polignac number, because 2100646996405 - 2³ = 2100646996397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2944276 + ... + 3587485.

It is an arithmetic number, because the mean of its divisors is an integer number (159074531748).

Almost surely, 2^{2100646996405} is an apocalyptic number.

It is an amenable number.

2100646996405 is a deficient number, since it is larger than the sum of its proper divisors (444545511563).

2100646996405 is a wasteful number, since it uses less digits than its factorization.

2100646996405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6532388.

The product of its (nonzero) digits is 2799360, while the sum is 52.

The spelling of 2100646996405 in words is "two trillion, one hundred billion, six hundred forty-six million, nine hundred ninety-six thousand, four hundred five".