999152587991 has 2 divisors, whose sum is σ = 999152587992. Its totient is φ = 999152587990.

The previous prime is 999152587943. The next prime is 999152588039. The reversal of 999152587991 is 199785251999.

It is a balanced prime because it is at equal distance from previous prime (999152587943) and next prime (999152588039).

It is a cyclic number.

It is not a de Polignac number, because 999152587991 - 2²² = 999148393687 is a prime.

It is a super-2 number, since 2×999152587991² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999152587891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499576293995 + 499576293996.

It is an arithmetic number, because the mean of its divisors is an integer number (499576293996).

Almost surely, 2^999152587991 is an apocalyptic number.

999152587991 is a deficient number, since it is larger than the sum of its proper divisors (1).

999152587991 is an equidigital number, since it uses as much as digits as its factorization.

999152587991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 165337200, while the sum is 74.

The spelling of 999152587991 in words is "nine hundred ninety-nine billion, one hundred fifty-two million, five hundred eighty-seven thousand, nine hundred ninety-one".