10638983891 has 8 divisors (see below), whose sum is σ = 11123808000. Its totient is φ = 10156014792.

The previous prime is 10638983879. The next prime is 10638983909. The reversal of 10638983891 is 19838983601.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10638983891 - 2²² = 10634789587 is a prime.

It is a super-2 number, since 2×10638983891² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10638983821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 452015 + ... + 474968.

It is an arithmetic number, because the mean of its divisors is an integer number (1390476000).

Almost surely, 2^10638983891 is an apocalyptic number.

10638983891 is a deficient number, since it is larger than the sum of its proper divisors (484824109).

10638983891 is an equidigital number, since it uses as much as digits as its factorization.

10638983891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 927505.

The product of its (nonzero) digits is 2239488, while the sum is 56.

The spelling of 10638983891 in words is "ten billion, six hundred thirty-eight million, nine hundred eighty-three thousand, eight hundred ninety-one".