61955687627 has 4 divisors (see below), whose sum is σ = 64649413200. Its totient is φ = 59261962056.

The previous prime is 61955687623. The next prime is 61955687683. The reversal of 61955687627 is 72678655916.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61955687627 - 2² = 61955687623 is a prime.

It is a super-2 number, since 2×61955687627² (a number of 22 digits) contains 22 as substring.

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 61955687627.

It is not an unprimeable number, because it can be changed into a prime (61955687623) 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 3 ways as a sum of consecutive naturals, for example, 1346862752 + ... + 1346862797.

It is an arithmetic number, because the mean of its divisors is an integer number (16162353300).

Almost surely, 2^61955687627 is an apocalyptic number.

61955687627 is a deficient number, since it is larger than the sum of its proper divisors (2693725573).

61955687627 is a wasteful number, since it uses less digits than its factorization.

61955687627 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2693725572.

The product of its digits is 38102400, while the sum is 62.

The spelling of 61955687627 in words is "sixty-one billion, nine hundred fifty-five million, six hundred eighty-seven thousand, six hundred twenty-seven".