1010645638 has 8 divisors (see below), whose sum is σ = 1521326088. Its totient is φ = 503536944.

The previous prime is 1010645627. The next prime is 1010645651. The reversal of 1010645638 is 8365460101.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 892231 + ... + 893362.

It is an arithmetic number, because the mean of its divisors is an integer number (190165761).

Almost surely, 2^1010645638 is an apocalyptic number.

1010645638 is a deficient number, since it is larger than the sum of its proper divisors (510680450).

1010645638 is a wasteful number, since it uses less digits than its factorization.

1010645638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1785878.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 1010645638 is about 31790.6533119406. The cubic root of 1010645638 is about 1003.5360277700.

The spelling of 1010645638 in words is "one billion, ten million, six hundred forty-five thousand, six hundred thirty-eight".