61253435217 has 16 divisors (see below), whose sum is σ = 88121851328. Its totient is φ = 37622335680.

The previous prime is 61253435207. The next prime is 61253435219. The reversal of 61253435217 is 71253435216.

It is not a de Polignac number, because 61253435217 - 2¹² = 61253431121 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61253435219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1481134 + ... + 1521927.

It is an arithmetic number, because the mean of its divisors is an integer number (5507615708).

Almost surely, 2^61253435217 is an apocalyptic number.

It is an amenable number.

61253435217 is a deficient number, since it is larger than the sum of its proper divisors (26868416111).

61253435217 is a wasteful number, since it uses less digits than its factorization.

61253435217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3003600.

The product of its digits is 151200, while the sum is 39.

Subtracting 61253435217 from its reverse (71253435216), we obtain a palindrome (9999999999).

The spelling of 61253435217 in words is "sixty-one billion, two hundred fifty-three million, four hundred thirty-five thousand, two hundred seventeen".