2971805196890 has 16 divisors (see below), whose sum is σ = 5349301249608. Its totient is φ = 1188710546496.

The previous prime is 2971805196889. The next prime is 2971805196907. The reversal of 2971805196890 is 986915081792.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1961150968921 + 1010654227969 = 1400411^2 + 1005313^2 .

It is a super-2 number, since 2×2971805196890² (a number of 26 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 317477 + ... + 2458536.

Almost surely, 2^{2971805196890} is an apocalyptic number.

2971805196890 is a deficient number, since it is larger than the sum of its proper divisors (2377496052718).

2971805196890 is a wasteful number, since it uses less digits than its factorization.

2971805196890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2883073.

The product of its (nonzero) digits is 19595520, while the sum is 65.

The spelling of 2971805196890 in words is "two trillion, nine hundred seventy-one billion, eight hundred five million, one hundred ninety-six thousand, eight hundred ninety".