26210345642 has 16 divisors (see below), whose sum is σ = 42342465480. Its totient is φ = 12096317952.

The previous prime is 26210345627. The next prime is 26210345647. The reversal of 26210345642 is 24654301262.

It can be written as a sum of positive squares in 4 ways, for example, as 22034730481 + 4175615161 = 148441^2 + 64619^2 .

It is not an unprimeable number, because it can be changed into a prime (26210345647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 742178 + ... + 776690.

Almost surely, 2^26210345642 is an apocalyptic number.

26210345642 is a deficient number, since it is larger than the sum of its proper divisors (16132119838).

26210345642 is a wasteful number, since it uses less digits than its factorization.

26210345642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63737.

The product of its (nonzero) digits is 69120, while the sum is 35.

The spelling of 26210345642 in words is "twenty-six billion, two hundred ten million, three hundred forty-five thousand, six hundred forty-two".