42541949987 has 2 divisors, whose sum is σ = 42541949988. Its totient is φ = 42541949986.

The previous prime is 42541949963. The next prime is 42541950001. The reversal of 42541949987 is 78994914524.

42541949987 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 is a cyclic number.

It is not a de Polignac number, because 42541949987 - 2⁸ = 42541949731 is a prime.

It is not a weakly prime, because it can be changed into another prime (42541949927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21270974993 + 21270974994.

It is an arithmetic number, because the mean of its divisors is an integer number (21270974994).

Almost surely, 2^42541949987 is an apocalyptic number.

42541949987 is a deficient number, since it is larger than the sum of its proper divisors (1).

42541949987 is an equidigital number, since it uses as much as digits as its factorization.

42541949987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26127360, while the sum is 62.

Adding to 42541949987 its sum of digits (62), we get a square (42541950049 = 206257²).

The spelling of 42541949987 in words is "forty-two billion, five hundred forty-one million, nine hundred forty-nine thousand, nine hundred eighty-seven".