10042850781 has 6 divisors (see below), whose sum is σ = 14506340030. Its totient is φ = 6695233848.

The previous prime is 10042850761. The next prime is 10042850791. The reversal of 10042850781 is 18705824001.

10042850781 is a `hidden beast` number, since 100 + 42 + 8 + 507 + 8 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 5425648281 + 4617202500 = 73659^2 + 67950^2 .

It is not a de Polignac number, because 10042850781 - 2⁵ = 10042850749 is a prime.

It is a super-2 number, since 2×10042850781² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10042850761) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 557936146 + ... + 557936163.

Almost surely, 2^10042850781 is an apocalyptic number.

It is an amenable number.

10042850781 is a deficient number, since it is larger than the sum of its proper divisors (4463489249).

10042850781 is a wasteful number, since it uses less digits than its factorization.

10042850781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1115872315 (or 1115872312 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 36.

The spelling of 10042850781 in words is "ten billion, forty-two million, eight hundred fifty thousand, seven hundred eighty-one".