10505456639 has 8 divisors (see below), whose sum is σ = 10706692752. Its totient is φ = 10304332480.

The previous prime is 10505456593. The next prime is 10505456641. The reversal of 10505456639 is 93665450501.

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 10505456639 - 2²⁴ = 10488679423 is a prime.

It is a super-2 number, since 2×10505456639² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10505456639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10505456699) 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, 175499 + ... + 227619.

It is an arithmetic number, because the mean of its divisors is an integer number (1338336594).

Almost surely, 2^10505456639 is an apocalyptic number.

10505456639 is a deficient number, since it is larger than the sum of its proper divisors (201236113).

10505456639 is an equidigital number, since it uses as much as digits as its factorization.

10505456639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55977.

The product of its (nonzero) digits is 486000, while the sum is 44.

The spelling of 10505456639 in words is "ten billion, five hundred five million, four hundred fifty-six thousand, six hundred thirty-nine".