10839640954321 has 9 divisors (see below), whose sum is σ = 10972089113961. Its totient is φ = 10708772896932.

The previous prime is 10839640954277. The next prime is 10839640954333. The reversal of 10839640954321 is 12345904693801.

The square root of 10839640954321 is 3292361.

It is a perfect power (a square), and thus also a powerful number.

It is a de Polignac number, because none of the positive numbers 2^k-10839640954321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10839640954621) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 273246130 + ... + 273285796.

Almost surely, 2^{10839640954321} is an apocalyptic number.

10839640954321 is the 3292361-st square number.

10839640954321 is the 1646181-st centered octagonal number.

It is an amenable number.

10839640954321 is a deficient number, since it is larger than the sum of its proper divisors (132448159640).

10839640954321 is an frugal number, since it uses more digits than its factorization.

10839640954321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79500 (or 39750 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 55.

The spelling of 10839640954321 in words is "ten trillion, eight hundred thirty-nine billion, six hundred forty million, nine hundred fifty-four thousand, three hundred twenty-one".