8145138202 has 4 divisors (see below), whose sum is σ = 12217707306. Its totient is φ = 4072569100.

The previous prime is 8145138191. The next prime is 8145138229. The reversal of 8145138202 is 2028315418.

It is a happy number.

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., 8103780441 + 41357761 = 90021^2 + 6431^2 .

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 as a sum of consecutive naturals, namely, 2036284549 + ... + 2036284552.

Almost surely, 2^8145138202 is an apocalyptic number.

8145138202 is a deficient number, since it is larger than the sum of its proper divisors (4072569104).

8145138202 is a wasteful number, since it uses less digits than its factorization.

8145138202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4072569103.

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 8145138202 is about 90250.4194006876. The cubic root of 8145138202 is about 2012.0224358753.

The spelling of 8145138202 in words is "eight billion, one hundred forty-five million, one hundred thirty-eight thousand, two hundred two".