10449858781 has 4 divisors (see below), whose sum is σ = 10457954464. Its totient is φ = 10441763100.

The previous prime is 10449858733. The next prime is 10449858799. The reversal of 10449858781 is 18785894401.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10449858781 - 2²³ = 10441470173 is a prime.

It is a super-2 number, since 2×10449858781² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10449858481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4045905 + ... + 4048486.

It is an arithmetic number, because the mean of its divisors is an integer number (2614488616).

Almost surely, 2^10449858781 is an apocalyptic number.

It is an amenable number.

10449858781 is a deficient number, since it is larger than the sum of its proper divisors (8095683).

10449858781 is an equidigital number, since it uses as much as digits as its factorization.

10449858781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8095682.

The product of its (nonzero) digits is 2580480, while the sum is 55.

The spelling of 10449858781 in words is "ten billion, four hundred forty-nine million, eight hundred fifty-eight thousand, seven hundred eighty-one".