42861503987 has 2 divisors, whose sum is σ = 42861503988. Its totient is φ = 42861503986.

The previous prime is 42861503983. The next prime is 42861504041. The reversal of 42861503987 is 78930516824.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42861503987 - 2² = 42861503983 is a prime.

It is not a weakly prime, because it can be changed into another prime (42861503981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21430751993 + 21430751994.

It is an arithmetic number, because the mean of its divisors is an integer number (21430751994).

It is a 1-persistent number, because it is pandigital, but 2⋅42861503987 = 85723007974 is not.

Almost surely, 2^42861503987 is an apocalyptic number.

42861503987 is a deficient number, since it is larger than the sum of its proper divisors (1).

42861503987 is an equidigital number, since it uses as much as digits as its factorization.

42861503987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2903040, while the sum is 53.

The spelling of 42861503987 in words is "forty-two billion, eight hundred sixty-one million, five hundred three thousand, nine hundred eighty-seven".