61205227651 has 8 divisors (see below), whose sum is σ = 61363627920. Its totient is φ = 61046886912.

The previous prime is 61205227637. The next prime is 61205227661. The reversal of 61205227651 is 15672250216.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61205227651 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 61205227651.

It is not an unprimeable number, because it can be changed into a prime (61205227621) 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, 2650411 + ... + 2673403.

It is an arithmetic number, because the mean of its divisors is an integer number (7670453490).

Almost surely, 2^61205227651 is an apocalyptic number.

61205227651 is a deficient number, since it is larger than the sum of its proper divisors (158400269).

61205227651 is a wasteful number, since it uses less digits than its factorization.

61205227651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29765.

The product of its (nonzero) digits is 50400, while the sum is 37.

Adding to 61205227651 its reverse (15672250216), we get a palindrome (76877477867).

The spelling of 61205227651 in words is "sixty-one billion, two hundred five million, two hundred twenty-seven thousand, six hundred fifty-one".