55657142201623 has 2 divisors, whose sum is σ = 55657142201624. Its totient is φ = 55657142201622.

The previous prime is 55657142201599. The next prime is 55657142201707. The reversal of 55657142201623 is 32610224175655.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55657142201623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55657142201123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27828571100811 + 27828571100812.

It is an arithmetic number, because the mean of its divisors is an integer number (27828571100812).

Almost surely, 2^{55657142201623} is an apocalyptic number.

55657142201623 is a deficient number, since it is larger than the sum of its proper divisors (1).

55657142201623 is an equidigital number, since it uses as much as digits as its factorization.

55657142201623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024000, while the sum is 49.

The spelling of 55657142201623 in words is "fifty-five trillion, six hundred fifty-seven billion, one hundred forty-two million, two hundred one thousand, six hundred twenty-three".