61272727637 has 16 divisors (see below), whose sum is σ = 66982712832. Its totient is φ = 55586158320.

The previous prime is 61272727597. The next prime is 61272727643. The reversal of 61272727637 is 73672727216.

It is not a de Polignac number, because 61272727637 - 2¹² = 61272723541 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 (61272727337) 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, 18526538 + ... + 18529844.

It is an arithmetic number, because the mean of its divisors is an integer number (4186419552).

Almost surely, 2^61272727637 is an apocalyptic number.

It is an amenable number.

61272727637 is a deficient number, since it is larger than the sum of its proper divisors (5709985195).

61272727637 is a wasteful number, since it uses less digits than its factorization.

61272727637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6328.

The product of its digits is 2074464, while the sum is 50.

The spelling of 61272727637 in words is "sixty-one billion, two hundred seventy-two million, seven hundred twenty-seven thousand, six hundred thirty-seven".