55891812401 has 2 divisors, whose sum is σ = 55891812402. Its totient is φ = 55891812400.

The previous prime is 55891812367. The next prime is 55891812437. The reversal of 55891812401 is 10421819855.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51456385600 + 4435426801 = 226840^2 + 66599^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55891812401 is a prime.

It is not a weakly prime, because it can be changed into another prime (55891812451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27945906200 + 27945906201.

It is an arithmetic number, because the mean of its divisors is an integer number (27945906201).

Almost surely, 2^55891812401 is an apocalyptic number.

It is an amenable number.

55891812401 is a deficient number, since it is larger than the sum of its proper divisors (1).

55891812401 is an equidigital number, since it uses as much as digits as its factorization.

55891812401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 115200, while the sum is 44.

The spelling of 55891812401 in words is "fifty-five billion, eight hundred ninety-one million, eight hundred twelve thousand, four hundred one".