4925494861821 has 20 divisors (see below), whose sum is σ = 7358017550400. Its totient is φ = 3283583112936.

The previous prime is 4925494861811. The next prime is 4925494861829. The reversal of 4925494861821 is 1281684945294.

It is a happy number.

4925494861821 is a `hidden beast` number, since 4 + 9 + 2 + 5 + 4 + 9 + 4 + 8 + 618 + 2 + 1 = 666.

It is not a de Polignac number, because 4925494861821 - 2⁵ = 4925494861789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4925494861829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2695660 + ... + 4137338.

It is an arithmetic number, because the mean of its divisors is an integer number (367900877520).

Almost surely, 2^{4925494861821} is an apocalyptic number.

It is an amenable number.

4925494861821 is a deficient number, since it is larger than the sum of its proper divisors (2432522688579).

4925494861821 is a wasteful number, since it uses less digits than its factorization.

4925494861821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1483870 (or 1483861 counting only the distinct ones).

The product of its digits is 39813120, while the sum is 63.

The spelling of 4925494861821 in words is "four trillion, nine hundred twenty-five billion, four hundred ninety-four million, eight hundred sixty-one thousand, eight hundred twenty-one".