2945685689971 has 2 divisors, whose sum is σ = 2945685689972. Its totient is φ = 2945685689970.

The previous prime is 2945685689857. The next prime is 2945685690029. The reversal of 2945685689971 is 1799865865492.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2945685689971 - 2³³ = 2937095755379 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2945685689891 and 2945685689900.

It is not a weakly prime, because it can be changed into another prime (2945685689171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1472842844985 + 1472842844986.

It is an arithmetic number, because the mean of its divisors is an integer number (1472842844986).

Almost surely, 2^{2945685689971} is an apocalyptic number.

2945685689971 is a deficient number, since it is larger than the sum of its proper divisors (1).

2945685689971 is an equidigital number, since it uses as much as digits as its factorization.

2945685689971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2351462400, while the sum is 79.

The spelling of 2945685689971 in words is "two trillion, nine hundred forty-five billion, six hundred eighty-five million, six hundred eighty-nine thousand, nine hundred seventy-one".