1641952138 has 16 divisors (see below), whose sum is σ = 2557990656. Its totient is φ = 789613920.

The previous prime is 1641952121. The next prime is 1641952201. The reversal of 1641952138 is 8312591461.

It is a self number, because there is not a number n which added to its sum of digits gives 1641952138.

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, 71131 + ... + 91342.

It is an arithmetic number, because the mean of its divisors is an integer number (159874416).

Almost surely, 2^1641952138 is an apocalyptic number.

1641952138 is a deficient number, since it is larger than the sum of its proper divisors (916038518).

1641952138 is a wasteful number, since it uses less digits than its factorization.

1641952138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162669.

The product of its digits is 51840, while the sum is 40.

The square root of 1641952138 is about 40521.0086004779. The cubic root of 1641952138 is about 1179.7414299862.

The spelling of 1641952138 in words is "one billion, six hundred forty-one million, nine hundred fifty-two thousand, one hundred thirty-eight".