2005050001656 has 64 divisors (see below), whose sum is σ = 5458865680800. Its totient is φ = 610006560768.

The previous prime is 2005050001649. The next prime is 2005050001679. The reversal of 2005050001656 is 6561000505002.

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, 36075841 + ... + 36131376.

Almost surely, 2^{2005050001656} is an apocalyptic number.

2005050001656 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

2005050001656 is an abundant number, since it is smaller than the sum of its proper divisors (3453815679144).

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

2005050001656 is a wasteful number, since it uses less digits than its factorization.

2005050001656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72207328 (or 72207324 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 30.

Adding to 2005050001656 its reverse (6561000505002), we get a palindrome (8566050506658).

The spelling of 2005050001656 in words is "two trillion, five billion, fifty million, one thousand, six hundred fifty-six".