61513622631517 has 8 divisors (see below), whose sum is σ = 70301474051456. Its totient is φ = 52725818972592.

The previous prime is 61513622631431. The next prime is 61513622631521. The reversal of 61513622631517 is 71513622631516.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61513622631517 - 2¹⁵ = 61513622598749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61513622631577) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9136473 + ... + 14370190.

It is an arithmetic number, because the mean of its divisors is an integer number (8787684256432).

Almost surely, 2^{61513622631517} is an apocalyptic number.

It is an amenable number.

61513622631517 is a deficient number, since it is larger than the sum of its proper divisors (8787851419939).

61513622631517 is a wasteful number, since it uses less digits than its factorization.

61513622631517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23880507.

The product of its digits is 1360800, while the sum is 49.

Subtracting 61513622631517 from its reverse (71513622631516), we obtain a palindrome (9999999999999).

The spelling of 61513622631517 in words is "sixty-one trillion, five hundred thirteen billion, six hundred twenty-two million, six hundred thirty-one thousand, five hundred seventeen".