6402144155 has 16 divisors (see below), whose sum is σ = 8873989344. Its totient is φ = 4382215680.

The previous prime is 6402144143. The next prime is 6402144157. The reversal of 6402144155 is 5514412046.

It is not a de Polignac number, because 6402144155 - 2²² = 6397949851 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6402144157) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3422672 + ... + 3424541.

It is an arithmetic number, because the mean of its divisors is an integer number (554624334).

Almost surely, 2^6402144155 is an apocalyptic number.

6402144155 is a deficient number, since it is larger than the sum of its proper divisors (2471845189).

6402144155 is a wasteful number, since it uses less digits than its factorization.

6402144155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6847246.

The product of its (nonzero) digits is 19200, while the sum is 32.

The square root of 6402144155 is about 80013.3998465257. The cubic root of 6402144155 is about 1856.8428495846.

The spelling of 6402144155 in words is "six billion, four hundred two million, one hundred forty-four thousand, one hundred fifty-five".