10721349890 has 8 divisors (see below), whose sum is σ = 19298429820. Its totient is φ = 4288539952.

The previous prime is 10721349871. The next prime is 10721349901. The reversal of 10721349890 is 9894312701.

It can be written as a sum of positive squares in 2 ways, for example, as 10716183361 + 5166529 = 103519^2 + 2273^2 .

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

It is a super-2 number, since 2×10721349890² (a number of 21 digits) contains 22 as substring.

It is a Curzon 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, 536067485 + ... + 536067504.

Almost surely, 2^10721349890 is an apocalyptic number.

10721349890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

10721349890 is a deficient number, since it is larger than the sum of its proper divisors (8577079930).

10721349890 is a wasteful number, since it uses less digits than its factorization.

10721349890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1072134996.

The product of its (nonzero) digits is 108864, while the sum is 44.

The spelling of 10721349890 in words is "ten billion, seven hundred twenty-one million, three hundred forty-nine thousand, eight hundred ninety".