44521621057 has 2 divisors, whose sum is σ = 44521621058. Its totient is φ = 44521621056.

The previous prime is 44521620991. The next prime is 44521621099. The reversal of 44521621057 is 75012612544.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41631913521 + 2889707536 = 204039^2 + 53756^2 .

It is a cyclic number.

It is not a de Polignac number, because 44521621057 - 2⁷ = 44521620929 is a prime.

It is not a weakly prime, because it can be changed into another prime (44521621357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22260810528 + 22260810529.

It is an arithmetic number, because the mean of its divisors is an integer number (22260810529).

Almost surely, 2^44521621057 is an apocalyptic number.

It is an amenable number.

44521621057 is a deficient number, since it is larger than the sum of its proper divisors (1).

44521621057 is an equidigital number, since it uses as much as digits as its factorization.

44521621057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 67200, while the sum is 37.

The spelling of 44521621057 in words is "forty-four billion, five hundred twenty-one million, six hundred twenty-one thousand, fifty-seven".