420547764541 has 2 divisors, whose sum is σ = 420547764542. Its totient is φ = 420547764540.

The previous prime is 420547764523. The next prime is 420547764577. The reversal of 420547764541 is 145467745024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 311397480900 + 109150283641 = 558030^2 + 330379^2 .

It is a cyclic number.

It is not a de Polignac number, because 420547764541 - 2²⁹ = 420010893629 is a prime.

It is a super-3 number, since 3×420547764541³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420547764041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210273882270 + 210273882271.

It is an arithmetic number, because the mean of its divisors is an integer number (210273882271).

Almost surely, 2^420547764541 is an apocalyptic number.

It is an amenable number.

420547764541 is a deficient number, since it is larger than the sum of its proper divisors (1).

420547764541 is an equidigital number, since it uses as much as digits as its factorization.

420547764541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3763200, while the sum is 49.

The spelling of 420547764541 in words is "four hundred twenty billion, five hundred forty-seven million, seven hundred sixty-four thousand, five hundred forty-one".