10261566438 has 16 divisors (see below), whose sum is σ = 20524134720. Its totient is φ = 3420355176.

The previous prime is 10261566437. The next prime is 10261566443. The reversal of 10261566438 is 83466516201.

10261566438 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×10261566438² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 10261566438.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10261566437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192693 + ... + 240111.

It is an arithmetic number, because the mean of its divisors is an integer number (1282758420).

Almost surely, 2^10261566438 is an apocalyptic number.

10261566438 is an abundant number, since it is smaller than the sum of its proper divisors (10262568282).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10261566438 is a wasteful number, since it uses less digits than its factorization.

10261566438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83491.

The product of its (nonzero) digits is 207360, while the sum is 42.

The spelling of 10261566438 in words is "ten billion, two hundred sixty-one million, five hundred sixty-six thousand, four hundred thirty-eight".