61622573641 has 8 divisors (see below), whose sum is σ = 66838832424. Its totient is φ = 56583137280.

The previous prime is 61622573581. The next prime is 61622573681. The reversal of 61622573641 is 14637522616.

It can be written as a sum of positive squares in 4 ways, for example, as 14793613641 + 46828960000 = 121629^2 + 216400^2 .

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

It is not a de Polignac number, because 61622573641 - 2¹⁵ = 61622540873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61622573681) 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, 44204880 + ... + 44206273.

It is an arithmetic number, because the mean of its divisors is an integer number (8354854053).

Almost surely, 2^61622573641 is an apocalyptic number.

It is an amenable number.

61622573641 is a deficient number, since it is larger than the sum of its proper divisors (5216258783).

61622573641 is a wasteful number, since it uses less digits than its factorization.

61622573641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88411211.

The product of its digits is 362880, while the sum is 43.

The spelling of 61622573641 in words is "sixty-one billion, six hundred twenty-two million, five hundred seventy-three thousand, six hundred forty-one".