2945406849 has 64 divisors (see below), whose sum is σ = 5009571840. Its totient is φ = 1495091520.

The previous prime is 2945406833. The next prime is 2945406853. The reversal of 2945406849 is 9486045492.

It is not a de Polignac number, because 2945406849 - 2⁴ = 2945406833 is a prime.

It is a super-2 number, since 2×2945406849² = 17350843012272217602, which contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2945406949) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1878864 + ... + 1880430.

It is an arithmetic number, because the mean of its divisors is an integer number (78274560).

Almost surely, 2^2945406849 is an apocalyptic number.

It is an amenable number.

2945406849 is a deficient number, since it is larger than the sum of its proper divisors (2064164991).

2945406849 is a wasteful number, since it uses less digits than its factorization.

2945406849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1770.

The product of its (nonzero) digits is 2488320, while the sum is 51.

The square root of 2945406849 is about 54271.6026020975. The cubic root of 2945406849 is about 1433.4474094833.

The spelling of 2945406849 in words is "two billion, nine hundred forty-five million, four hundred six thousand, eight hundred forty-nine".