4021946977773 has 4 divisors (see below), whose sum is σ = 5362595970368. Its totient is φ = 2681297985180.

The previous prime is 4021946977757. The next prime is 4021946977781. The reversal of 4021946977773 is 3777796491204.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 4021946977773 - 2⁴ = 4021946977757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4021946977073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 670324496293 + ... + 670324496298.

It is an arithmetic number, because the mean of its divisors is an integer number (1340648992592).

Almost surely, 2^{4021946977773} is an apocalyptic number.

It is an amenable number.

4021946977773 is a deficient number, since it is larger than the sum of its proper divisors (1340648992595).

4021946977773 is a wasteful number, since it uses less digits than its factorization.

4021946977773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1340648992594.

The product of its (nonzero) digits is 112021056, while the sum is 66.

The spelling of 4021946977773 in words is "four trillion, twenty-one billion, nine hundred forty-six million, nine hundred seventy-seven thousand, seven hundred seventy-three".