61223140571 has 16 divisors (see below), whose sum is σ = 65958617088. Its totient is φ = 56682964800.

The previous prime is 61223140549. The next prime is 61223140579. The reversal of 61223140571 is 17504132216.

It is a cyclic number.

It is not a de Polignac number, because 61223140571 - 2¹⁴ = 61223124187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61223140579) 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, 135845 + ... + 375366.

It is an arithmetic number, because the mean of its divisors is an integer number (4122413568).

Almost surely, 2^61223140571 is an apocalyptic number.

61223140571 is a deficient number, since it is larger than the sum of its proper divisors (4735476517).

61223140571 is a wasteful number, since it uses less digits than its factorization.

61223140571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511402.

The product of its (nonzero) digits is 10080, while the sum is 32.

Adding to 61223140571 its reverse (17504132216), we get a palindrome (78727272787).

The spelling of 61223140571 in words is "sixty-one billion, two hundred twenty-three million, one hundred forty thousand, five hundred seventy-one".