2158353587987 has 2 divisors, whose sum is σ = 2158353587988. Its totient is φ = 2158353587986.

The previous prime is 2158353587963. The next prime is 2158353588047. The reversal of 2158353587987 is 7897853538512.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2158353587987 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2158353587987.

It is not a weakly prime, because it can be changed into another prime (2158353587287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1079176793993 + 1079176793994.

It is an arithmetic number, because the mean of its divisors is an integer number (1079176793994).

Almost surely, 2^{2158353587987} is an apocalyptic number.

2158353587987 is a deficient number, since it is larger than the sum of its proper divisors (1).

2158353587987 is an equidigital number, since it uses as much as digits as its factorization.

2158353587987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 508032000, while the sum is 71.

The spelling of 2158353587987 in words is "two trillion, one hundred fifty-eight billion, three hundred fifty-three million, five hundred eighty-seven thousand, nine hundred eighty-seven".