61516706743637 has 4 divisors (see below), whose sum is σ = 62383139233056. Its totient is φ = 60650274254220.

The previous prime is 61516706743627. The next prime is 61516706743703. The reversal of 61516706743637 is 73634760761516.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61516706743637 - 2⁶ = 61516706743573 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61516706743637.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61516706743607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 433216244603 + ... + 433216244744.

It is an arithmetic number, because the mean of its divisors is an integer number (15595784808264).

Almost surely, 2^{61516706743637} is an apocalyptic number.

It is an amenable number.

61516706743637 is a deficient number, since it is larger than the sum of its proper divisors (866432489419).

61516706743637 is an equidigital number, since it uses as much as digits as its factorization.

61516706743637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 866432489418.

The product of its (nonzero) digits is 80015040, while the sum is 62.

The spelling of 61516706743637 in words is "sixty-one trillion, five hundred sixteen billion, seven hundred six million, seven hundred forty-three thousand, six hundred thirty-seven".