2136558478 has 8 divisors (see below), whose sum is σ = 3205786968. Its totient is φ = 1067962824.

The previous prime is 2136558469. The next prime is 2136558497. The reversal of 2136558478 is 8748556312.

It is a happy number.

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 pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149676 + ... + 163327.

It is an arithmetic number, because the mean of its divisors is an integer number (400723371).

Almost surely, 2^2136558478 is an apocalyptic number.

2136558478 is a deficient number, since it is larger than the sum of its proper divisors (1069228490).

2136558478 is a wasteful number, since it uses less digits than its factorization.

2136558478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316418.

The product of its digits is 1612800, while the sum is 49.

The square root of 2136558478 is about 46222.9215649552. The cubic root of 2136558478 is about 1287.9675701202.

The spelling of 2136558478 in words is "two billion, one hundred thirty-six million, five hundred fifty-eight thousand, four hundred seventy-eight".