2136430778 has 16 divisors (see below), whose sum is σ = 3286445184. Its totient is φ = 1041138240.

The previous prime is 2136430763. The next prime is 2136430811. The reversal of 2136430778 is 8770346312.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24500 + ... + 69807.

It is an arithmetic number, because the mean of its divisors is an integer number (205402824).

Almost surely, 2^2136430778 is an apocalyptic number.

2136430778 is a deficient number, since it is larger than the sum of its proper divisors (1150014406).

2136430778 is a wasteful number, since it uses less digits than its factorization.

2136430778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94597.

The product of its (nonzero) digits is 169344, while the sum is 41.

The square root of 2136430778 is about 46221.5401950216. The cubic root of 2136430778 is about 1287.9419094237.

The spelling of 2136430778 in words is "two billion, one hundred thirty-six million, four hundred thirty thousand, seven hundred seventy-eight".