4945078561 has 8 divisors (see below), whose sum is σ = 5069355104. Its totient is φ = 4821223680.

The previous prime is 4945078547. The next prime is 4945078597. The reversal of 4945078561 is 1658705494.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 4945078561 - 2⁹ = 4945078049 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4945078261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81600 + ... + 128641.

It is an arithmetic number, because the mean of its divisors is an integer number (633669388).

Almost surely, 2^4945078561 is an apocalyptic number.

It is an amenable number.

4945078561 is a deficient number, since it is larger than the sum of its proper divisors (124276543).

4945078561 is a wasteful number, since it uses less digits than its factorization.

4945078561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210831.

The product of its (nonzero) digits is 1209600, while the sum is 49.

The square root of 4945078561 is about 70321.2525556819. The cubic root of 4945078561 is about 1703.6919257288.

The spelling of 4945078561 in words is "four billion, nine hundred forty-five million, seventy-eight thousand, five hundred sixty-one".