1009571999987 has 2 divisors, whose sum is σ = 1009571999988. Its totient is φ = 1009571999986.

The previous prime is 1009571999977. The next prime is 1009572000001. The reversal of 1009571999987 is 7899991759001.

It is a weak prime.

It is an emirp because it is prime and its reverse (7899991759001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1009571999987 - 2³² = 1005277032691 is a prime.

It is a super-2 number, since 2×1009571999987² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1009571999977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 504785999993 + 504785999994.

It is an arithmetic number, because the mean of its divisors is an integer number (504785999994).

Almost surely, 2^{1009571999987} is an apocalyptic number.

1009571999987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1009571999987 is an equidigital number, since it uses as much as digits as its factorization.

1009571999987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 115736040, while the sum is 74.

The spelling of 1009571999987 in words is "one trillion, nine billion, five hundred seventy-one million, nine hundred ninety-nine thousand, nine hundred eighty-seven".