61226261565 has 16 divisors (see below), whose sum is σ = 111956592768. Its totient is φ = 27989148096.

The previous prime is 61226261563. The next prime is 61226261567. The reversal of 61226261565 is 56516262216.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (61226261563) and next prime (61226261567).

It is not a de Polignac number, because 61226261565 - 2¹ = 61226261563 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61226261563) 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 15 ways as a sum of consecutive naturals, for example, 291553522 + ... + 291553731.

It is an arithmetic number, because the mean of its divisors is an integer number (6997287048).

Almost surely, 2^61226261565 is an apocalyptic number.

It is an amenable number.

61226261565 is a deficient number, since it is larger than the sum of its proper divisors (50730331203).

61226261565 is a wasteful number, since it uses less digits than its factorization.

61226261565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 583107268.

The product of its digits is 259200, while the sum is 42.

The spelling of 61226261565 in words is "sixty-one billion, two hundred twenty-six million, two hundred sixty-one thousand, five hundred sixty-five".