55401521603 has 2 divisors, whose sum is σ = 55401521604. Its totient is φ = 55401521602.

The previous prime is 55401521563. The next prime is 55401521639. The reversal of 55401521603 is 30612510455.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55401521603 - 2¹⁶ = 55401456067 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55401521603.

It is not a weakly prime, because it can be changed into another prime (55401521303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27700760801 + 27700760802.

It is an arithmetic number, because the mean of its divisors is an integer number (27700760802).

Almost surely, 2^55401521603 is an apocalyptic number.

55401521603 is a deficient number, since it is larger than the sum of its proper divisors (1).

55401521603 is an equidigital number, since it uses as much as digits as its factorization.

55401521603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18000, while the sum is 32.

The spelling of 55401521603 in words is "fifty-five billion, four hundred one million, five hundred twenty-one thousand, six hundred three".