420291752891 has 2 divisors, whose sum is σ = 420291752892. Its totient is φ = 420291752890.

The previous prime is 420291752857. The next prime is 420291752899. The reversal of 420291752891 is 198257192024.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 420291752891 - 2¹⁴ = 420291736507 is a prime.

It is not a weakly prime, because it can be changed into another prime (420291752899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210145876445 + 210145876446.

It is an arithmetic number, because the mean of its divisors is an integer number (210145876446).

Almost surely, 2^420291752891 is an apocalyptic number.

420291752891 is a deficient number, since it is larger than the sum of its proper divisors (1).

420291752891 is an equidigital number, since it uses as much as digits as its factorization.

420291752891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 725760, while the sum is 50.

The spelling of 420291752891 in words is "four hundred twenty billion, two hundred ninety-one million, seven hundred fifty-two thousand, eight hundred ninety-one".