42906845575631 has 2 divisors, whose sum is σ = 42906845575632. Its totient is φ = 42906845575630.

The previous prime is 42906845575579. The next prime is 42906845575687. The reversal of 42906845575631 is 13657554860924.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42906845575631 - 2³⁸ = 42631967668687 is a prime.

It is a super-2 number, since 2×42906845575631² (a number of 28 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42906845575831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21453422787815 + 21453422787816.

It is an arithmetic number, because the mean of its divisors is an integer number (21453422787816).

It is a 1-persistent number, because it is pandigital, but 2⋅42906845575631 = 85813691151262 is not.

Almost surely, 2^{42906845575631} is an apocalyptic number.

42906845575631 is a deficient number, since it is larger than the sum of its proper divisors (1).

42906845575631 is an equidigital number, since it uses as much as digits as its factorization.

42906845575631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728000, while the sum is 65.

The spelling of 42906845575631 in words is "forty-two trillion, nine hundred six billion, eight hundred forty-five million, five hundred seventy-five thousand, six hundred thirty-one".