55637546421601 has 2 divisors, whose sum is σ = 55637546421602. Its totient is φ = 55637546421600.

The previous prime is 55637546421481. The next prime is 55637546421683. The reversal of 55637546421601 is 10612464573655.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49308498044001 + 6329048377600 = 7022001^2 + 2515760^2 .

It is a cyclic number.

It is not a de Polignac number, because 55637546421601 - 2²¹ = 55637544324449 is a prime.

It is not a weakly prime, because it can be changed into another prime (55637546421701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27818773210800 + 27818773210801.

It is an arithmetic number, because the mean of its divisors is an integer number (27818773210801).

Almost surely, 2^{55637546421601} is an apocalyptic number.

It is an amenable number.

55637546421601 is a deficient number, since it is larger than the sum of its proper divisors (1).

55637546421601 is an equidigital number, since it uses as much as digits as its factorization.

55637546421601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144000, while the sum is 55.

The spelling of 55637546421601 in words is "fifty-five trillion, six hundred thirty-seven billion, five hundred forty-six million, four hundred twenty-one thousand, six hundred one".