2158545494 has 8 divisors (see below), whose sum is σ = 3700363728. Its totient is φ = 925090920.

The previous prime is 2158545481. The next prime is 2158545509. The reversal of 2158545494 is 4945458512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77090897 + ... + 77090924.

It is an arithmetic number, because the mean of its divisors is an integer number (462545466).

Almost surely, 2^2158545494 is an apocalyptic number.

2158545494 is a deficient number, since it is larger than the sum of its proper divisors (1541818234).

2158545494 is a wasteful number, since it uses less digits than its factorization.

2158545494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154181830.

The product of its digits is 1152000, while the sum is 47.

The square root of 2158545494 is about 46460.1495262338. The cubic root of 2158545494 is about 1292.3705971834.

The spelling of 2158545494 in words is "two billion, one hundred fifty-eight million, five hundred forty-five thousand, four hundred ninety-four".