20777001016461 has 16 divisors (see below), whose sum is σ = 28116319179264. Its totient is φ = 13644511057584.

The previous prime is 20777001016403. The next prime is 20777001016489. The reversal of 20777001016461 is 16461010077702.

It is not a de Polignac number, because 20777001016461 - 2⁹ = 20777001015949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20777001016061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52579126 + ... + 52972808.

It is an arithmetic number, because the mean of its divisors is an integer number (1757269948704).

Almost surely, 2^{20777001016461} is an apocalyptic number.

It is an amenable number.

20777001016461 is a deficient number, since it is larger than the sum of its proper divisors (7339318162803).

20777001016461 is a wasteful number, since it uses less digits than its factorization.

20777001016461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656320.

The product of its (nonzero) digits is 98784, while the sum is 42.

The spelling of 20777001016461 in words is "twenty trillion, seven hundred seventy-seven billion, one million, sixteen thousand, four hundred sixty-one".