2605443705978 has 8 divisors (see below), whose sum is σ = 5210887411968. Its totient is φ = 868481235324.

The previous prime is 2605443705911. The next prime is 2605443706001. The reversal of 2605443705978 is 8795073445062.

It is a sphenic number, since it is the product of 3 distinct primes.

2605443705978 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 217120308826 + ... + 217120308837.

It is an arithmetic number, because the mean of its divisors is an integer number (651360926496).

Almost surely, 2^{2605443705978} is an apocalyptic number.

2605443705978 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2605443705978 is a wasteful number, since it uses less digits than its factorization.

2605443705978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434240617668.

The product of its (nonzero) digits is 50803200, while the sum is 60.

The spelling of 2605443705978 in words is "two trillion, six hundred five billion, four hundred forty-three million, seven hundred five thousand, nine hundred seventy-eight".