61622539901 has 8 divisors (see below), whose sum is σ = 68651105880. Its totient is φ = 54920884032.

The previous prime is 61622539873. The next prime is 61622539903. The reversal of 61622539901 is 10993522616.

It can be written as a sum of positive squares in 4 ways, for example, as 32205625 + 61590334276 = 5675^2 + 248174^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 61622539901 - 2¹⁸ = 61622277757 is a prime.

It is a super-3 number, since 3×61622539901³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61622539903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81727130 + ... + 81727883.

It is an arithmetic number, because the mean of its divisors is an integer number (8581388235).

Almost surely, 2^61622539901 is an apocalyptic number.

It is an amenable number.

61622539901 is a deficient number, since it is larger than the sum of its proper divisors (7028565979).

61622539901 is a wasteful number, since it uses less digits than its factorization.

61622539901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163455055.

The product of its (nonzero) digits is 174960, while the sum is 44.

The spelling of 61622539901 in words is "sixty-one billion, six hundred twenty-two million, five hundred thirty-nine thousand, nine hundred one".