2158320698 has 4 divisors (see below), whose sum is σ = 3237481050. Its totient is φ = 1079160348.

The previous prime is 2158320683. The next prime is 2158320709. The reversal of 2158320698 is 8960238512.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2046024289 + 112296409 = 45233^2 + 10597^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 539580173 + ... + 539580176.

Almost surely, 2^2158320698 is an apocalyptic number.

2158320698 is a deficient number, since it is larger than the sum of its proper divisors (1079160352).

2158320698 is a wasteful number, since it uses less digits than its factorization.

2158320698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1079160351.

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 2158320698 is about 46457.7302286713. The cubic root of 2158320698 is about 1292.3257321223.

The spelling of 2158320698 in words is "two billion, one hundred fifty-eight million, three hundred twenty thousand, six hundred ninety-eight".