10721731782 has 8 divisors (see below), whose sum is σ = 21443463576. Its totient is φ = 3573910592.

The previous prime is 10721731777. The next prime is 10721731789. The reversal of 10721731782 is 28713712701.

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

10721731782 is an admirable number.

It is a super-2 number, since 2×10721731782² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 10721731782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10721731789) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 893477643 + ... + 893477654.

It is an arithmetic number, because the mean of its divisors is an integer number (2680432947).

Almost surely, 2^10721731782 is an apocalyptic number.

10721731782 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10721731782 is a wasteful number, since it uses less digits than its factorization.

10721731782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1786955302.

The product of its (nonzero) digits is 32928, while the sum is 39.

The spelling of 10721731782 in words is "ten billion, seven hundred twenty-one million, seven hundred thirty-one thousand, seven hundred eighty-two".