548751157621 has 2 divisors, whose sum is σ = 548751157622. Its totient is φ = 548751157620.

The previous prime is 548751157589. The next prime is 548751157697. The reversal of 548751157621 is 126751157845.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 548747600625 + 3556996 = 740775^2 + 1886^2 .

It is a cyclic number.

It is not a de Polignac number, because 548751157621 - 2⁵ = 548751157589 is a prime.

It is a super-2 number, since 2×548751157621² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (548751157021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274375578810 + 274375578811.

It is an arithmetic number, because the mean of its divisors is an integer number (274375578811).

Almost surely, 2^548751157621 is an apocalyptic number.

It is an amenable number.

548751157621 is a deficient number, since it is larger than the sum of its proper divisors (1).

548751157621 is an equidigital number, since it uses as much as digits as its factorization.

548751157621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2352000, while the sum is 52.

The spelling of 548751157621 in words is "five hundred forty-eight billion, seven hundred fifty-one million, one hundred fifty-seven thousand, six hundred twenty-one".