42251539877 has 2 divisors, whose sum is σ = 42251539878. Its totient is φ = 42251539876.

The previous prime is 42251539829. The next prime is 42251539927. The reversal of 42251539877 is 77893515224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27328718596 + 14922821281 = 165314^2 + 122159^2 .

It is a cyclic number.

It is not a de Polignac number, because 42251539877 - 2¹⁰ = 42251538853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42251539277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21125769938 + 21125769939.

It is an arithmetic number, because the mean of its divisors is an integer number (21125769939).

Almost surely, 2^42251539877 is an apocalyptic number.

It is an amenable number.

42251539877 is a deficient number, since it is larger than the sum of its proper divisors (1).

42251539877 is an equidigital number, since it uses as much as digits as its factorization.

42251539877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4233600, while the sum is 53.

The spelling of 42251539877 in words is "forty-two billion, two hundred fifty-one million, five hundred thirty-nine thousand, eight hundred seventy-seven".