46781486021 has 2 divisors, whose sum is σ = 46781486022. Its totient is φ = 46781486020.

The previous prime is 46781485909. The next prime is 46781486029. The reversal of 46781486021 is 12068418764.

46781486021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46102101796 + 679384225 = 214714^2 + 26065^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-46781486021 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (46781486029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23390743010 + 23390743011.

It is an arithmetic number, because the mean of its divisors is an integer number (23390743011).

Almost surely, 2^46781486021 is an apocalyptic number.

It is an amenable number.

46781486021 is a deficient number, since it is larger than the sum of its proper divisors (1).

46781486021 is an equidigital number, since it uses as much as digits as its factorization.

46781486021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 516096, while the sum is 47.

The spelling of 46781486021 in words is "forty-six billion, seven hundred eighty-one million, four hundred eighty-six thousand, twenty-one".