61540214071 has 16 divisors (see below), whose sum is σ = 72113364288. Its totient is φ = 51414854400.

The previous prime is 61540214051. The next prime is 61540214111. The reversal of 61540214071 is 17041204516.

It is not a de Polignac number, because 61540214071 - 2²³ = 61531825463 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61540214051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 215601 + ... + 411781.

It is an arithmetic number, because the mean of its divisors is an integer number (4507085268).

Almost surely, 2^61540214071 is an apocalyptic number.

61540214071 is a deficient number, since it is larger than the sum of its proper divisors (10573150217).

61540214071 is a wasteful number, since it uses less digits than its factorization.

61540214071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197322.

The product of its (nonzero) digits is 6720, while the sum is 31.

Adding to 61540214071 its reverse (17041204516), we get a palindrome (78581418587).

The spelling of 61540214071 in words is "sixty-one billion, five hundred forty million, two hundred fourteen thousand, seventy-one".